Home » Forums » Fix Bikes

Fixed cranks

patgoral's picture
Submitted by patgoral on Sun, 06/22/2008 - 18:19

I have a 59 Motobecane frame and I have a 170mm sugino messenger crankset but no matter what I do my toe clips drag on the ground whenever I ride. I don't mean when I am turning, I mean like when I try to mount they scrape the street. Would a 165mm or a 167.5mm really make a big difference?

‹ But it goes to 11... Dome Piece ›
»
Dfunk's picture

Yes

Submitted by Dfunk on Sun, 06/22/2008 - 18:36.

If you were striking by more than a minimal amount, then it's likely that the crank would pick your back wheel off the ground at the bottom of each pedal stroke. They recommend (possibly require) 165mm cranks on the track for a good reason. If you don't mind my asking, is this the same bike that the yellow, non-machined deep-v's will be going on? If so, what kind of handlebar do you intend to install on this bicycle?

»
patgoral's picture

The bike is done, I am not

Submitted by patgoral on Sun, 06/22/2008 - 18:57.

The bike is done, I am not new to fixed gear riding this is just the first bike I have built up myself. I bought the frame off the sopo frame art show. I have soma el toro pursuit bars on it. All that is hitting the ground is the tip of the toe clips and the pedals will scrape if I am taking an extremely sharp turn.

http://a343.ac-images.myspacecdn.com/images01/39/l_b24ed32e77c9b6ee328c3... this is the bike before I wrapped the handlebars.

»
Dfunk's picture

Been reading too much BikeSNobNYC

Submitted by Dfunk on Wed, 06/25/2008 - 11:11.

Yay, no riser bar!!

»

170 mm - 167.5 mm = 2.5

Submitted by paul h on Sun, 06/22/2008 - 20:25.

170 mm - 167.5 mm = 2.5 mm
170 mm - 165 mm = 5 mm

That's how much difference it'll make

»
patgoral's picture

haha I know that, will it

Submitted by patgoral on Sun, 06/22/2008 - 21:22.

haha I know that, will it effect my pedaling power or anything?

»

.

Submitted by paul h on Sun, 06/22/2008 - 22:44.

radius of 25x700C tire := 335 mm

2.5 mm/335 mm = 0.0075
5.0 mm/335 mm = 0.0149

http://sheldonbrown.com/bbdrop.html

»
patgoral's picture

Thank ya!

Submitted by patgoral on Sun, 06/22/2008 - 23:09.

Thank ya!

»
patgoral's picture

I got sugino messenger 165's

Submitted by patgoral on Wed, 06/25/2008 - 08:52.

I got sugino messenger 165's and they work perfect.

»