Monday, May 04, 2015

Holy Chromoly...

72.5cm effective toptube, folks. 7 pounds of steel, 29+. I used 34.9mm Supertherm downtubes for the toptube and seat tube (yes, those are really fun to bend...) Ronnie should love it.

1 5/8 x. 049" downtube - Ronnie is going to run a 150mm travel 29er fork,  which means you need the beef...

Friday, May 01, 2015

29+ pics, a few thoughts

I love 29+. Not just because my Chupacabra+curved blade rigid fork is the smoothest ride short of suspension I've ever had (and allowed me to ride rigid again for the first time in years) but also because:
-Great way for really big/tall folks to get on a tire that is proportional in diameter/volume to the loads they're going to put on it.
-3" tires are a great in-between spot for folks who don't want to ride a full-on fatbike OR race and suffer on 2" semislicks.
-Traction is just outstanding (I like around 15-20psi) and it's hard to go back to skinny tires!
-They are a no-brainer for tandems where traction, rollover, and stoker comfort are big concerns.

Here's Tom's fork intimidating a 2.35" tire that was an innocent bystander.

Wednesday, April 29, 2015

Fist test says...

...Ronnie's 29+ will have loads of room for big tires.

And yes, my fist is bigger than a Chupacabra. I do use real tools to measure as well...

Monday, April 27, 2015

72.5cm effective toptube...

Not much to give it context here, but this is going to be one BIG bike...29+ is a godsend for those really big folks out there! Upward curved toptube? Standover's not a problem when you have a 94cm saddle height and ~40" inseam!

Just to get the bars high enough, this will use a 150mm travel MRP stage fork!

Saturday, April 25, 2015

PSA: Get paid to build and maintain trails!

It's not too often that this kind of job opens up and Los Alamos is a very, very cool place. They even have a brewery now, to go with their 100+ miles of trails (all in a 100 square mile county!)

Thursday, April 23, 2015

Spring Cleaning Part Deux

Updated: price drop!

I built this fatbike for Miguel several years ago. In the intervening time, it's been ridden all over the world, put on planes, raced, and generally beaten on. And fatbike technology has moved on some.

Then he decided he wanted a slacker seat angle so I built him a new frame and took this one back to serve as my fatbike for the year. So now it's got 2 people worth of abuse on it. Powdercoat  (Red Baron) is in mediocre shape at best with several scratches that go through to bare metal (these can be touched up with nail polish, or just ignored - they're not a functional problem, but they're ugly).

But it doesn't really fit me, and I'm lusting after something more modern (it's 170 spacing, longish chainstays, no tapered steerer for Bluto-fun, etc). So I'm selling it cheap! $800 $700 takes this nice package:
-WW fat frame with lots of nicks and scratches but no dents or structural damage.
-Cane Creek 1 1/8 40 series headset.
-Thomson layback post.
-SRAM X9 175mm fatbike cranks/BB with 28t MRP Bling Ring, all in good functional shape.

I'm also happy to sell you a full build kit if you want more parts at my usual smoking prices.

Now, details on the frame geometry:
-70 HTA (with a 450mm fork), 73 STA
-61cm/24" effective toptube, about 67.5 cm front center (will vary some based on fork offset)
-49cm/19" seat tube (center to top)
-160mm/6.25" head tube
-Upward curved toptube - limited standover (~32") unless you are long-legged!
-45cm chainstays, plenty of clearance for a 4.5" tire. You will run out of chain clearance with anything bigger.
-~300mm/12" BB height with 4.5" tires, lower with smaller ones, a bit higher with 29+ tires.
-Plenty of room for B+/27.5+ or 29+ tires, pretty much any wheel/tire configuration you want will work.
-170mm symmetrical rear spacing, 100mm BB shell, designed for ~62-65mm chainline
-Downtube cable routing for full length housing, Paragon low mount dropouts. Takes a 27.2 seatpost.
-Will work fine with 80-100mm travel 29er forks or anything in the 440-480mm axle to crown range, but no tapered steerers.

This frame IMO would be best built up as a summertime dirt trails and packed snow cruiser. If you're going adventuring in deep snow the upward curved toptube and lack of 5" tires is going to be a bummer. Ideal candidate is 6'-6'3" or so with long legs and short arms/torso. It's built pretty beefy (Miguel had a kid seat mounted for a while) so up to 220# riders are fine.

Questions? Drop me a line!