SRAM Artworks

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Sep 142011
 

SRAM gave a bunch of parts to different artists, and this is one of the more, uh, interesting creations.

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Pivot Cycles

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Sep 142011
 

Breakfast with the guys from Pivot, then we created this ominous rolling mob of black umbrellas. Wal-greens sold a lot of umbrellas this morning.

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Bottom Bracket Evolution

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Sep 122011
 

Interbike coverage starts September 14th, but there’s still time to submit questions and requests about new products. I’m there to be your eyes and ears, and knees and elbows, too.

Question: I had an old Gary Fisher with a press-fit bottom bracket, and replacing it was a crazy pain in the ass. (Plus it was basically just two bearings, and the bearings were garbage so everything had to be replaced every couple years.) Now I see this horrible idea resurfacing like a bad hippie flashback. Is this just retro stupidity, or have things actually gotten better?

Answer: Gary Fisher, Sharp Dressed Man
Gary Fisher really is a visionary, it’s just that at some periods in his life he was wearing those little, diamond-shaped, red-tinted glasses, and some things weren’t entirely in focus. Seriously, he never stops trying to build a better mousetrap, and he was painfully ahead of the curve on some things (bottom-brackets, sure, but also oversized head tubes). Pushing forward on standards causes plenty of headaches, but sometimes it makes for breakthroughs. For a while there around 2003, Trek seemed to be relegating Fisher to a tent out in the back of their real offices, until everyone started shopping at the tent (remember Trek’s STP vs. Fisher’s Sugar? Trek’s 69ers vs. Fisher’s 29ers?). The guy knows stuff.

So there was a logic to that first attempt at an alternate kind of bottom-bracket, but you’re completely right in hating those things. They were awful. Compared to what we have these days, those original snap-in bearing systems were not good.

Current systems are pretty good, though some of the same problems remain. The first problem is compatibility: when a new system is introduced, it creates problems for replacing parts. We have so many different “standards” on the market simultaneously right now, that it’s tough even to know which bottom bracket fits your new frame, let alone how good it is. Here’s a quick list of the most common ones:

  1. BB30 uses circlips to hold bearings inside the frame’s bottom bracket shell, like those old systems, but, because both the bearings and frame’s shell are much larger, durability is much better, and stiffness is drastically better.
  2. Press Fit BB30 is oversized, just like the standard BB30, but presses into the frame in a way similar to conventional headset cups.
  3. Good Ol’ Threaded Cartridge systems were offered in both traditional square tapered spindle and various splined spindles, but have been all but completely replaced by external bearing systems, which share the same frame shell dimenions.
  4. External Bearing bottom brackets thread into the frame just like cartridge systems, but have oversized bearings that sit outside the frame shell.
  5. BB86 and BB90 systems are based on the BB30 concept, but use wider frame shells (86mm and 90mm, respectively).
  6. Shimano’s 92mm press-fit bottom bracket presses into special 92mm wide frames in a way that’s very similar to headsets, and basically takes the External Bearing style cup system and makes the frame’s bottom bracket shell wide enough to swallow up the otherwise external bearings.
  7. BB386EVO systems attempt to bring all this together by being both large diameter (like the BB30), and wide (like the 86, 90, and 92) systems.

Basically, we’re going bigger diameter and wider in everything, and the bigger diameter and wider shell make for a stiffer crankset, which really does improve your power output. But the increased size also allows us to get away with designs like the press-in system, that we previously couldn’t, when sizes were smaller and materials were inferior. Almost any system you go with these days is going to perform better than previous designs, and be more reliable as well. The evolution wasn’t always smooth or direct, but, overall, these new systems are better.

Interbike 2015: a Preview

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Sep 092011
 

Interbike 2011 is about to get underway, and I’ll be there asking questions like “When will we actually see these at dealers?” and “How drunk were you when you designed this?” What with Eurobike just ending and Interbike just beginning, we’re all focused on seeing the latest stuff.

With that in mind, here’s a preview of some products we might be seeing–not at this year’s Interbike, but a few years from now. Think of this as the bike version of seeing the new Nike McFly. Some of what you’re about to see may never come to be, but some will, and all of it’s interesting. Finding this information is possible thanks to my extraordinary powers of prognostication, but also thanks to publicly available patent information anyone can access any time.

Integrated Shifting and Suspension Systems

I don’t know if Specialized will ever produce products using this patent, but they’ve had these plans to integrate shifting and suspension since 2006. As a guy who still dislikes anti-lock brakes, I tend to hope this stays on the shelf, but who knows. Maybe they could do something incredible with this.

Vibration Damping System for a Seatpost

There are plenty of weird things out there in Patent Land that aren’t yet attached to a company with the resources to see them into production, and this could be one of those, but I get the feeling we’ll see this actually hit the market at some point.

Trek Suspension Fork

Difficult to say exactly why Trek would have filed a patent application for a suspension fork in February of 2010. If it’s an attempt to make inexpensive forks for entry level bikes, you’d still think they’d just license something–and they sure wouldn’t put Jose Gonzalez and Greg Buhl, the guys behind anything serious going on with suspension designs at Trek, behind this project.

Trek’s Concentric Rear Derailleur

No, I don’t think Trek is muscling in on Shimano and SRAM’s turf, but this suggests the boys in Wisconsin are dedicated to their Active Braking Pivot frame design.

Craig Calfee Suspension Frame Design

Though it sure seems to pay homage to the classic Moots circa Kent Eriksen YBB design, Calfee’s design for a soft-tail looks distinct, cleanly done, and really intriguing, and it’s certainly possible we’ll see bikes using this design soon.

Shimano Suspension Fork

It’s certainly possible this fork will never see the light or day, or worse–that it’s intended for a hybrid. Shimano already shows fork patents that seem suited to light duty use, but this thing looks a little sophisticated for a trip to the grocery store. In addition to this patent, the same drawings appear in a second patent that details a process for transferring air between two different chambers using a lever, which gets really interesting, once you’ve seen the third patent, filed in April of 2008, that seems to show a dual remote system for managing both travel and damping (Fig. 2 below), or their external reservoir electronically controlled fork damping system.

Bizarre Dual Shock Suspension Design

Okay, so we probably won’t ever see this thing, and maybe it’s for the better, but part of me sure hopes it surfaces somewhere, somehow. Probably won’t be at a show, though. Interbike has become so incredibly expensive for the exhibitors these days that you never see insane, goofy shit like this anymore, and that’s truly sad. Here’s to you, dual-shock, elevated combo-chainstay-linkage design.

My Own Suspension Design

Maybe you’ll see it one day. I’m working on having a prototype built now. Feel free to submit questions about it using the question submission thing up at the top of the page, there on the right.

Electronically Cooled Fox Suspension

An excerpt from this patent application, filed in 2009, suggests the use of a “thermoelectric generator” that would use a magnet passing coiling wires during movement of the shock to activate a cooling device. Another, even wilder, possible embodiment introduces something called “piezo electric crystals” that would generate electricity when under compression. In all cases, these “TEGs” or thermoelectric generators, have the ability to literally move heat around, and that alone is pretty insane. By the time the application starts suggesting the TEGs can “based on the Peltier Effect and correspondingly constructed from thin ceramic wafers having alternate P and N doped bismuth telluride sandwiched between them,” I’m willing to just give Fox the benefit of the doubt and believe this crazy bastards are really serious about making suspension systems. I mean holy shit, guys.

The examples go on, and now that you know where to look, please feel free to roam around all up in the patent club. I haven’t even mentioned some really interesting suspension designs. Good, bad, or ugly, these patents are all proof that we belong to an incredibly creative and innovative industry.

Carbon Fiber vs. Obesity: Know Your Character Alignment

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Sep 082011
 

Question: I see pictures of gorgeous carbon bikes from Santa Cruz and Ibis and everyone else, but I am neither svelte nor graceful. How fat is too fat for carbon fiber?

Answer: A few companies–most notably road wheelset manufactuers–do list recommended weight limits for specific products, but most frame manufacturers tend to side-step the issue with ambiguous wording, or no information at all. Current carbon fiber frames do have the potential to be stronger than metal frames in almost every way. The traditionally bullshit marketing term “stronger than steel,” is actually true when it comes to carbon fiber; it really is incredibly strong, and its basic construction method tends to be very reliable and extremely consistent. You can put exactly as much material precisely where you need it on a carbon fiber frame, and that precision makes for huge improvements in strength and stiffness. Most clydesdales assume carbon fiber is going to be weak and flexy simply because it’s so light, but even crazy-light frames like the Santa Cruz Blur XC and Tallboy genuinely feel stiffer and more solid than their aluminum counterparts. So modern carbon fiber (unlike the Scott Black Magic handlebars I broke every third ride in the early ’90s–they would keep warrantying them for as long as your suicidal tendencies persisted) is very good. In fact, the only area in which a well-made carbon fiber frame is at a disadvantage to more traditional metal frames is impact. With a few glaring exceptions carbon fiber can’t take a punch.

In most cases, the real question isn’t, “Do I weigh too much for carbon fiber?” but rather, “Do I crash too much for carbon fiber?” And it’s not only how often you crash, but how unpleasant those crashes tend to be. There are many shades of “not graceful.” Classifying yourself based on your last three bails will tell you more about the lifespan of your future carbon fiber frame than your weight alone will ever reveal.

Figuring out which specific type of trainwreck best describes your riding can be done using personality tests like the Minnesota Multiphasic Personality Inventory or the Myers-Briggs indicators, but looking around on the Internet, I found an even better personality test called “Character Alignment” from an organization called Dungeons and Dragons. Here’s a simple guide to help each of us determine his or her own level of personal destructiveness.


Chaotic Good



You mostly only hurt yourself.
Carbon Fiber for you? Might as well.
Bonus points for: Sand


Neutral Good



Ambivalent about authority, but not capable of achieving “damage velocity.”
Carbon Fiber for you? You’ve earned it.
Bonus points for: Getting your mom’s attention.


Lawful Good



Your bike will last forever.
Carbon Fiber for you? Yes.
Bonus points for: Flip-flops.


Lawful Neutral



You respect gravity, but are rightfully suspicious of higher powers.
Carbon Fiber for you? No.
Bonus points for: Getting up in the morning.


Just Neutral



Whatever. I’m getting a beer.
Carbon Fiber for you? No.
Bonus points for: Jeans and a t-shirt.


Chaotic Neutral



Society says you can’t jump in lycra. Fuck that.
Carbon Fiber for you? Unfortunately, yes.
Bonus points for: Sticking it to the man.


Chaotic Evil



You are a tool of pure and total annihilation.
Carbon Fiber for you? Nope.
Bonus points for: Thinning the herd.


Lawful Evil



Experienced enough to investigate situations that will truly, utterly destroy a bike.
Carbon Fiber for you? No.
Bonus points for: Riding our concussions.


Neutral Evil



You really only care about yourself, and you’re pretty awful even at that.
Carbon fiber for you? Yes, because it’s sexy.
Bonus points for: Sass.

Hopefully, this helps clarify things. When it doubt, stick with chromoly.

Fewer Gears, a Psychoanalysis

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Sep 052011
 

Part of me will always be a full-on bike tech nerd. Can’t help it. I understand how the Cane Creek Double Barrel rear shock works; I know how fork rake affects handling; apparently, I even patented a suspension system back in 2007 (more on this soon). But there’s another me–sadly, also an early-40s guy with marauding twin boys and permanent joint pain–who really seems to appreciate simpler things. Particularly when it comes to bicycles.

According to our communal data dump, Wikipedia, “asceticism” is defined all thusly:

Asceticism (from the Greek: ἄσκησις, áskēsis, “exercise” or “training”) describes a lifestyle characterized by abstinence from various sorts of worldly pleasures often with the aim of pursuing religious and spiritual goals. Some forms of Christianity (see especially Monastic life) and the Indian religions (including yoga) teach salvation and liberation and involve a process of mind-body transformation effected by exercising restraint with respect to actions of body, speech, and mind. The founders and earliest practitioners of these religions (e.g. Buddhism, Jainism, the Christian desert fathers) lived extremely austere lifestyles, refraining from sensual pleasures and the accumulation of material wealth. This is to be understood not as an eschewal of the enjoyment of life, but a recognition that spiritual and religious goals are impeded by such indulgence.
wikipedia.org/wiki/Asceticism

From Wikipedia, I’d almost expected something more along the lines of “the ability to evade airport security through feats of agility while smuggling illegal substances in your ‘body cavity,'” but they came through for me here. Asceticism is a kind of austerity of desire. As I get older, I find myself riding bicycles that better meet that description.

Don’t get me wrong. I owned a badass bike shop for over a decade, and I’ve not decided to sell off the brilliant bikes I’ve accumulated in favor of things I make myself out of PVC pipe. I like quality as much as ever. A part of me is just sick of doo-dads and crap. And by “doo-dads,” I mostly mean “gears.”

I dislike multiple gears. Always have. And yet they come in exceedingly handy where I live. The compromise I’ve worked out over the years seems to be using as few of them as possible, and leaving the one I keep nice and big and painful to pedal. To that end, I’ve been tinkering obsessively with this 1×10 project bike lately.

Jones Project 1x10

You’re mostly looking at a Merlin-era Jeff Jones Steel Diamond frame and Truss Fork. Though they’re very thin, I’ve had surprisingly good luck with Reynolds carbon 29er wheels, and I’m going for almost a monster-cross kind of vibe here–something I can ride anywhere, from pretty ugly trails to pavement.

No Front Derailleur, No Shocks, No Worries

There’s a Maxxis Ikon on the back right now, and an Ardent up front, but that’s going to change. I’m using Hope Tech X2 brakes. Stem and post are Thomson, and the crankset is a RaceFace Deus spinning on an Acros ceramic bottom bracket.

34t Chainring with an 11-28t Cassette

I’m using an MRP 1.x guide to keep the chain on a 34t Salsa ring. The rear cassette is an 11-28t SRAM PG-1070. An X.9 10-speed rear derailleur gets switched by a single SRAM thumb shifter (from their TT shifters) mounted on a Paul Thumbie, and pulling through a combination of carbon and white Nokon cables (didn’t have a full set of any one color around).

Not Much Going On Up Here

So how’s it working out? I have to admit, I’m in love with the single ring up front idea. I think triples are the anti-Christ and have used doubles for years now–was beyond happy when SRAM released the original XX group (which I still have on a Pivot Mach 429). But I’m less in love with the admittedly small amount of chain rub I get on the MRP 1.x guide. I’m considering modifying that, or maybe even going with an N’Gear Jump Stop along with an outer bash guard, or fiddling with a Paul’s Chain Keeper (which looks like it’d be exactly the same as the MRP. Noise really is very minimal and can’t be heard on anything but pavement, but still, I just can’t abide the idea of my chain dragging along across the inside of a chain guide, even if I can’t constantly hear it.

But the next immediate project is the gearing itself. Tight trails and steep climbs or not, I’m going to bolt on a larger front chainring–like a 36 or 38-tooth. This may mean switching to a cassette with lower gearing as well, to offset, but I’m going to try the really tall and miserable gearing first. I just hate small diameter chainrings and cassettes, and the 34t isn’t doing it for me. I swear I’m one of those weird people who can feel a big decrease in chain friction (or something really positive) when switching to larger diameter chain rings and cassette cogs. All this needs some experimentation.

But that’s why this is a project bike, and that’s also the beauty of simplifying things. How long am I going to last on a bike with essentially road bike gearing, narrow tires, and no suspension? The nerd part of me? Not long. He geeked out on setting up the Nokon cables (which switch to white right where they pass the white headtube and along the seat stay, then go back to black), and hasn’t shown his face again since. But the ascetic me, the one searching for spiritual guidance or something, really likes riding this bike.

Still a Work in Progress

Any psychologist would probably say the 1×10 Jones project is my response to getting older, and to leaving the online bike shop I founded and operated for way more than a decade. And they’d be right. I left Speedgoat.com at the end of April, and I’m taking a deep breath right now, clearing away the clutter, and reprioritizing what’s really important to me. I grew up riding rigid steel mountain bikes with gearing that was simpler and much harder to pedal. So many bikes and years later, there’s something really wonderful about coming home to that original feeling again.

Interbike 2011

 Bikes  3 Responses »
Sep 022011
 

Just confirmed I’m off to Interbike to cover the show for Dirt Rag. Get in touch and let me know what you want to see. I am merely a vessel.

I’ll be posting my coverage directly to be a blog starting on September 14th.

Now check out this rad Firebird I saw today.

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