Passion Trail Bikes, Belmont, CA - specialists in quality bike service and custom-built mountain bikes: October Build of the Month - 29er Specialized Stumpjumper

October Build of the Month - 29er Specialized Stumpjumper

PeterD — Sun, 10 Feb 2008 18:22:00 +0000

This customer brought some parts in for Charles to build up a 29er bike around (and yes, he only brought one derailer in, though I don’t think that is he reason this bike ended up as a 1 by 9).

Charles worked with the customer on spec’ing the rest, aiming to build a solid trail bike for a very fit athlete, with a variety of durable, light weight components that work well and look great together.

The Selle SMP Evolution saddle is pretty unique, and was a special order. Some additional highlights are the transparent chain guard and chainstay guard, 1×9 drive train, and hand built wheels.

Highlights from the Build List
Frame	Specialized Stumpjumper 29, Silver 19”, 08
Fork	Fox F100 RLC 29r 08 Disc
Headset	Chris King, 1-1/8” Navy
Brake Levers	Magura Marta SL Silver
Stem	Ritchey 90×6* Axis 44 Stem, WCS 31.8
Front Brake	Magura Marta-SL Silver, 180m
Rear Brake	Magura Marta-SL Silver, 160m
Grips	Rocca Locking Grip Blk
Shifters	SRAM XO Triggers
Rear Derailer	SRAM XO Short Cage
Cassette	SRAM 11-34 PG-990 “06 9sp
Crank	175m 32t 1Sp MegaExo V Drv Blk
Saddle	Selle SMP Evolution Blue
Pedals	Crank Brothers Egg Beater 2 Ti Blk
Wheels	Salsa rims w/ King hubs
Front Tire	Specialized The Captain 2.0 29r 2Bliss
Rear Tire	Specialized Roll X D2 UST

"October Build of the Month - 29er Specialized Stumpjumper" by Joe P

Wed, 12 Mar 2008 01:37:32 +0000

My chain was popping off on big drops but I purchased a third eye chain watcher and hit some of the drops where I would lose my chain and no problem.

"October Build of the Month - 29er Specialized Stumpjumper" by Charles

Fri, 22 Feb 2008 00:26:35 +0000

We have set up a couple different things for cyclocross racers using 1×9’s and 1×10’s. Both use a light weight plate on the outside of the chainring, like a Salsa Crossing Guard or Ring Dinger. On the inside you can use either another plate, or a Third Eye Chain Watcher mounted to the seat tube. Both systems are cleaner and quieter than a DH guide. Passion has both in stock if you want see them.

"October Build of the Month - 29er Specialized Stumpjumper" by Smileystyle

Thu, 21 Feb 2008 23:51:34 +0000

I’ve got a 1×9 on my salsa hardtail and I do have some chain retention problems… I’m guessing since I don’t have a front derailer the chain doesn’t have a way of realigning when it starts getting really bumpy and pops off. Aside from running a front derailer, do you have any simple chainguide solutions (ie inside and outside ring guards) that don’t require a full-on downhill chainguide? I’ve looked around a bit and haven’t found what I’m looking for yet.

"October Build of the Month - 29er Specialized Stumpjumper" by Charles

Tue, 19 Feb 2008 20:52:18 +0000

Nope. The chain stays on the one ring the same way it would stay on any middle chainring on a triple set up.

"October Build of the Month - 29er Specialized Stumpjumper" by Just wondering

Tue, 19 Feb 2008 06:42:15 +0000

No chainguide needed?

"October Build of the Month - 29er Specialized Stumpjumper" by Joe P

Fri, 15 Feb 2008 19:11:46 +0000

Thats exactly why this bike ended up as a 1×9. I had the vision the entire way, Charles just helped clean my vision up for me.

"October Build of the Month - 29er Specialized Stumpjumper" by PeterD

Sun, 10 Feb 2008 18:53:49 +0000

Ok, I am running a bit behind on posting BOTMs… Sorry about that.