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

Go Back   > >

Cyclocross and Gravelbiking (Recreational) 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

Thread Tools Search this Thread
Old 08-05-06, 10:13 PM   #1
Thread Starter
Join Date: Jun 2006
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
MTB or Road Components?

This is my first build and first CX bike. I'm wondering which components are better to use, MTB or Road? I guess I'm really just talking about the derailers. I'm going to be using it primary around town and on dirt roads with a few trails here and there. I don't intend to compete with it, at least not yet.

I have can get a good deal ($330) on some used Dura Ace stuff:

- Dura Ace 9 speed shifters, flight deck ready.
- Dura Ace 9 speed rear derailleur (RD 7700), short cage.
- Dura Ace 9 speed braze-on front derailleur (FD 7700), double.
- Dura Ace 9 speed crank set, 53-39, 175 mm crank arms.
- Dura Ace Octalink bottom bracket (BB-7700). English, 109.5 spindle.
- Ultegra 9 speed cassette: 12-25.
- New 9 speed SRAM PC 971 chain.

What do you guys think?
mrshish is offline   Reply With Quote
Old 08-06-06, 03:48 AM   #2
Senior Member
cs1's Avatar
Join Date: Feb 2004
Location: Clev Oh
Bikes: Specialized, Schwinn
Posts: 6,769
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 54 Post(s)
$330.00 on a clean Dura Ace group is a good price. It's a shame to burn it up on a cross bike. If it were me, I would build up a nice road bike with it. Your really going to trash your components in all that mud and dirt. It doesn't make sense to use expensive parts IMO. Good luck

cs1 is offline   Reply With Quote
Old 08-06-06, 08:46 AM   #3
Rabbinic Authority
Join Date: Jun 2005
Location: Silver Spring, MD (MABRA/MAC)
Bikes: Cannondale Cyclocross, Specialized Langster, Giant TCR-C2 Composite
Posts: 650
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
CX bikes, in all reality, are more a derivative of raod bikes instead of MTBs, even though MTB technology in the past ten years has revolutionized cycling technology in general.

With a CX bike, the gearing not very different from that of a road bike. The gearing will be a bit lower, but the range of gears will be the same, if not, less than that of a road bike. With that in mind, short cage derailleurs and derailleurs for double cranks (or used as "chain guides" on single cranks) are the norm.

Dura-Ace will work just fine, especially the used setup you've described below. Just remember, as has been mentioned already, that components on a CX tend to take more of a beating than on the road. Otherwise, $330 bucks for everything you listed? Hell, go for it and have fun.
jpearl is offline   Reply With Quote
Old 08-08-06, 05:07 AM   #4
Senior Member
MrCjolsen's Avatar
Join Date: Nov 2004
Location: Davis CA
Bikes: Surly Cross-Check, '85 Giant road bike (unrecogizable fixed-gear conversion
Posts: 3,957
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Your list of components sounds like the stuff I took off the used Surly Crosscheck I acquired last week. Dura Ace doubles aren't really well suited to cross bike frames, (at least the Surly) and here's why.

With a 109.5 bottom bracket, my cranks were dangerously close to my very wide chainstays. With the 118.5 bottom bracket, my chainrings were so far out that using anything but the smalles cogs gave me some really wierd chainlines. And with the 53/39 setup, I needed the big cogs.

I could have gone to a triple, but that would have meant new derraileurs and a lot more money.

I ended up getting a square taper bottom bracket and taking the old Suntour cranks off my fixed gear and using them with the Surly. They were 110 bcd, so I had some options as far as chainring sizes. I went with a 48/36 setup. This gives me more use of the smaller cogs.

And the Dura Ace cranks are much more at home now on my fixie.

BTW, I put on new Dura Ace bar end shifters. They are AWESOME!
MrCjolsen is offline   Reply With Quote
Old 08-10-06, 09:34 PM   #5
Senior Member
Join Date: Dec 2005
Location: Sunny Tampa, Florida
Posts: 1,269
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 22 Post(s)
My experience with a D/A crank is very different, but so's my frame. I'm running an old Conquest and the Dura Ace fits and runs perfectly. The chainline is fine. The one thing that needs changed in the OP's component group, I'd pull that 53t ring and replace it with a 46 or 48, depending on how fast you ride on the road. Otherwise all that should work very nicely. As others have said, maybe too nice to beat up off road, but for the money that's not a bad deal. You wouldn't pay much less for new Mirage.

Ronsonic is offline   Reply With Quote
Old 08-11-06, 07:52 AM   #6
Senior Member
Join Date: Dec 2004
Location: St Paul, MN
Posts: 698
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
DA derailleurs will work just fine on your bike. I've been racing with the same short-cage DA rear derailleur for the past three seasons. It's never given me any problems regardless of the course conditions. I am, however, running a single 38t ring up front, instead of a double. I'm also using a DA bar end shifter, which is superbly reliable. My bike originally came with 105's, which crapped out completely after one season.
lunacycle is offline   Reply With Quote
Old 08-11-06, 11:17 AM   #7
In Transition
fruitless's Avatar
Join Date: Nov 2005
Location: here and there
Posts: 382
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
clean used DA derailleurs go for less than XTR on ebay and personally I'll never buy used MTB components (again). DA is tough stuff, crank issues are going to be specific to the frame you have. I run a single ring front and DA bar-end/rear Derailleur and its the most reliable solidly shifting set-up I've had on any bike.
"nem vem que nao tem"
fruitless is offline   Reply With Quote
Old 08-15-06, 04:33 PM   #8
L-time Cat4 & proud of it
Join Date: May 2006
Location: NoVA for now
Bikes: There's 4... 1 of ea
Posts: 173
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I'm running pretty much full XTR 'just cause.' Road stuff works but doesn't seem to have quite the sealing that mtn parts do. If you ride in the dry, it isn't as big a deal.

Either way, maintain your stuff and you'll be OK.


Gummee is offline   Reply With Quote

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 11:56 AM.

  • Ask a Question
    get answers from real people!
Click to start entering your question.