Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Recreational Cyclocross and Gravelbiking This has to be the most physically intense sport ever invented. It's high speed bicycle racing on a short off road course or riding the off pavement rides on gravel like :The Dirty Kanza". We also have a dedicated Racing forum for the Cyclocross Hard Core Racers.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 03-02-12, 03:48 PM   #1
fxdgrjedi
Fakenger
Thread Starter
 
Join Date: Feb 2008
Bikes: Yo Eddy Team, Serotta Colorado II
Posts: 177
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Making my old steel road frame trail ready.

Hello all.

I am interested in doing a little CX riding on my old steel road bike that I use for commuting. It is a late 80's early 90's Atala race frame with Columbus SL tubing, but the funny thing is that it has the clearance for 38's in the front and 32s in the rear. I currently have it set up as a fixed-gear commuter with road tyres on it, riding every day to work and back.

Since I never have time to MTB anymore I was thinking of hitting the trails as part of my before/after work commute on the Atala. I am seriously in need of some singletrack.

I have most of the parts that I need (i think) to make it into a SSCX frankenbike. Tektro levers, 39t chainring etc. The only thing that I am stuck on are brakes. Without welding on canti mounts or disc tabs, what is the best way to go about getting brakes on with clearance for fat tires? I have seen people use old center-pull brakes that mount in the regular road brake "hole" Would these give me the clearance I need vs regular sidepull road calipers?

Oh, and what is a good SS gearing for trail riding?

Thanks!
fxdgrjedi is offline   Reply With Quote
Old 03-02-12, 03:58 PM   #2
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 22,233
Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 1155 Post(s)
Start with 2:1 Chainring:cog, with the 39, a 20t freewheel.

Brakes , measure reach..
center line of the mounting hole to the center of the braking track.

then shop the dimension.
fietsbob is offline   Reply With Quote
Old 03-02-12, 04:09 PM   #3
Andy_K 
Senior Member
 
Andy_K's Avatar
 
Join Date: Jan 2008
Location: Beaverton, OR
Bikes: 2013 Kona Jake, 2015 Kona Jake the Snake, 2008 Kona Major Jake, 2013 Kona Jake the Snake, 2006 Kona Kula, 2012 Ridley Excalibur, 2001 LeMond Buenos Aires, 1984 Pinarello Gran Turismo, 1982 Trek 614, 1978 Austro-Daimler, 1987 Pinarello Montello
Posts: 9,172
Mentioned: 24 Post(s)
Tagged: 0 Thread(s)
Quoted: 304 Post(s)
Quote:
Originally Posted by fxdgrjedi View Post
I have seen people use old center-pull brakes that mount in the regular road brake "hole" Would these give me the clearance I need vs regular sidepull road calipers?
Probably. This is a picture of my old '77 Gitane's rear brake.



That bike started with 27 inch wheels and I converted it to 700c, so I had to use some extremely long reach center pulls.

Depending on your bike, you may be able to achieve the same result with long reach caliper brakes. I think the real determining factor is how far your tires are from the brake bridge. Long reach calipers won't really help if you don't have a long reach to the rims.

The 2:1 ratio fietsbob is a commonly accepted starting point for CX racing. For just riding relatively tame trails you can probably use something a bit taller if you like, maybe 39-16.
__________________
My Bikes
Andy_K is offline   Reply With Quote
Old 03-10-12, 12:18 AM   #4
VonVelo
Junior Member
 
VonVelo's Avatar
 
Join Date: Mar 2012
Bikes:
Posts: 19
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Paul Components makes a ridiculously sweet center pull brake that works with a road style brake mount. For gearing a 42x16 is pretty stout but if you're not hitting loads of climbing it's not bad. Gearing really depends on the terrain and how much pain you're willing to suffer through - :-)
VonVelo is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 06:58 PM.