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 08-05-07, 12:55 PM   #1
Tony O
Noob In Training...
Thread Starter
 
Join Date: Jun 2007
Location: Santa Cruz, California
Bikes: '03 Kona JTS , '59 Schwinn Traveller , '61 Schwinn Corvette
Posts: 59
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Any REAL differences between cyclocross crank and road crank?

Hey guys and gals,

I was perusing the Nashbar site and came across two items that look pretty identical to me, Truvativ cranks on sale:

http://www.nashbar.com/profile.cfm?c...DRoad%20Cranks

http://www.nashbar.com/profile.cfm?c...DRoad%20Cranks

I tried to find exact specs on Truvativ website to no avail. To me for all intents and purposes they look exactly the same except one is $30 cheaper. These same cranks came on my JTS so I'm thinking of picking up another set for my Nashbar build.

any thoughts on differences or advantages of one over the other?
thanks
Tony O
Tony O is offline   Reply With Quote
Old 08-05-07, 01:13 PM   #2
cslone
Quarq shill
 
cslone's Avatar
 
Join Date: Jul 2004
Location: Ohio
Bikes: 08 Felt F4, 05 Fuji Team SL, 08 Planet X Stealth, 10 Kona Jake the Snake, 03 Giant OCR flat bar.
Posts: 3,962
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Pretty much just looks like the road one has 53/39 rings while the cross one has 46/38 rings.
cslone is offline   Reply With Quote
Old 08-05-07, 04:46 PM   #3
acorn_user
Senior Member
 
Join Date: Dec 2005
Location: Charlottesville, Virginia
Bikes: Dawes Kalahari, Puch Prima Super Sport, Graham Weigh 853
Posts: 1,990
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Most road cranks have a Bolt Circle Diameter (BCD) or 130mm or 135mm. Cross cranks and compact doubles have a bcd of 110mm. 110 is good news, because it gives you a lot of flexibility, up and down. The lowest chainring you can get on 130 is 38t (39t on 135). If you search for compact, you'll get more hits. Recommend the Sugino XD.
acorn_user is offline   Reply With Quote
Old 08-05-07, 06:01 PM   #4
cslone
Quarq shill
 
cslone's Avatar
 
Join Date: Jul 2004
Location: Ohio
Bikes: 08 Felt F4, 05 Fuji Team SL, 08 Planet X Stealth, 10 Kona Jake the Snake, 03 Giant OCR flat bar.
Posts: 3,962
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by acorn_user View Post
Most road cranks have a Bolt Circle Diameter (BCD) or 130mm or 135mm. Cross cranks and compact doubles have a bcd of 110mm. 110 is good news, because it gives you a lot of flexibility, up and down. The lowest chainring you can get on 130 is 38t (39t on 135). If you search for compact, you'll get more hits. Recommend the Sugino XD.
Those are both 130 bcd.
cslone is offline   Reply With Quote
Old 08-06-07, 12:57 PM   #5
cachehiker
Soma Lover
 
Join Date: Dec 2004
Location: Logan, UT
Bikes: one bike for every day of the week
Posts: 765
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I just converted my old Ultegra 6500 Double to cross duty by installing 38/48 chainrings.
cachehiker is offline   Reply With Quote
Old 08-06-07, 01:30 PM   #6
same time
Senior Member
 
Join Date: Jun 2005
Location: Washington DC
Bikes:
Posts: 962
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Look the same to me, except the chainrings. It uses the same length bb spindle, etc.

Wow, 50 bucks is pretty cheap. Of course, if you had to buy smaller chainrings, there would go the savings. I would hold out for 110 bcd cranks, but I like small gears. I think my cross bike has 32/42 on it.
same time is offline   Reply With Quote
Old 08-09-07, 12:58 AM   #7
Tony O
Noob In Training...
Thread Starter
 
Join Date: Jun 2007
Location: Santa Cruz, California
Bikes: '03 Kona JTS , '59 Schwinn Traveller , '61 Schwinn Corvette
Posts: 59
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
thanks for the feedback guys. With both the advice I've recieved on this forum and also with a bit of web research, I've decided that I'd like to go with a compact crank of some sort, maybe the Truvativ one in my original link or something similar (for my Nashbar build) The JTS I have came with a 53/39 chainring and an 11-34T bracket and though I'm certainly not a competitive cyclist by any stretch of the imagination, I don't find the 53 too big for roads around and I rarely ride on the smaller chainring so I'm a bit confused on what might be the best combo for me. I think maybe my bet is whatever I choose up front, to stick with 11-34T in the back to give me a bit more oomph on the flats.

Now I just need to start spending a bit more time on ebay as I'm realizing all too quickly what most of you already know...building up a bike from scratch (especially with new parts) can be a very expensive lesson
and really doesn't make much economic sense (better off buying complete bike!).

live and learn...
-Tony O
Tony O 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 02:13 AM.