January 25, 2010

A 650B Project

I have had this '99 Trek 930 from for a while now; it's in great structural condition and I've ridden it set-up many different ways. The last of which as a full rigid single speed. This steel beaut' has been hanging in the rafters long enough, because I have decided to build a Bridgestone Xo-1 Tribute bike. Grant Petersen now pushes the 650B format so I've figured I will build this as a 650B rigid, with cantilever brakes and a mustache bar. Yes the BB height will go up just a bit, but I'm OK with that: at least it is no longer collecting dust. I confirmed that the Pacenti Quasi-Moto will fit without a problem, but I think I'll be using the Schwalbe Marathon slicks most of the time. I also have some cheap 650B tires I found that would handle light trail duty as well. Either tire will fit fine along with a set of full fenders. I will be moving the canti mounts to achieve proper brake reach, on both the frame and the cromo rigid fork. I may even add rack mounts to the fork.

I'll update as the project progresses.


MMcG said...

I look forward to following this project as it progresses.

umarth said...

A couple things. I have an '89 Rockhopper that I've done 650b on. For trail work, it handled best with a 26" wheel in the back. I recently picked up another 650b wheelset to turn it into a commuter, but I really disliked the 650b in comparison to the 26". Taller, larger wheels made it painfully dull handling on the road, which is funny, because it was a lot of fun on the singletrack. Maybe handling will be better if you go with a shorter fork than what your bike was designed for?

I used FMF powermoto brakes- they have a lot of reach and work well, I think. They might still have some available if you scour ebay.

Good luck.

Cracked Headtube said...

I have already moved the brake posts. If you were unaware I build frames also, so this procedure was easier than finding-buying-paying for- and shipping a converter brakeset. The 930B is nearly finished (without a repaint). Stay tuned.

Waterat Pat said...

I am curious about what fenders you will spec. Have you found 650B specific fenders or are you planning fabricating/reworking a 700c set?

Anonymous said...


Anonymous said...

"I'll update as the project progresses.".....

Cracked Headtube said...

OK I'll give you all my component choices for this project. It is nearing completion, and the frame still needs to be repainted.
I am recycling many of my extra parts to revive this bike.

Bar: One On Mungo

Stem: Salsa Moto Ace

Shifters: 9spd Shimano BarCon

Levers: Soma

Headset: Generic Cartridge

Seatpost: Generic alloy

Crankset: Shimano Deore HTII, 44-32-22

Rims: Sun CR18, 32hole

Hubs: WTB disc compatible

Tires: Schwalbe Marathon 42

Chain: TBD

Cassette: TBD, but likely a Ultegra 12/25

Saddle: WTB low end