|Are mtn. bikes ever built up with a double front ring? (nm)||eyebob|
Dec 12, 2003 9:16 AM
|What do you mean?||Dwayne Barry|
Dec 12, 2003 9:26 AM
|Are they ever sold that way, or do people build them up that way?
If the former probably never, if the the latter yes. If you're strong enough or don't live around steep climbs or at altitude, etc. the little chainring is often overkill. Just take it off put on a smallish "middle" ring adjust your stops for the front derailleur and you're set. I ran my old mountain bike that way the last year or two I had rode it and liked that set-up.
Dec 12, 2003 11:42 AM
|I've got my dream hard tail frame (from eBay) and I want to build up a (my last!) race worthy hard tail. I've done enough mtn racing to know that you never have to use the granny up front so I was wondering (to save weight) whether I could just run a double chain ring up front instead. If I understand you correctly, I can. That's nice!
|Yes, at least I think Cannondale does or did? nm||DougSloan|
Dec 12, 2003 9:54 AM
Dec 12, 2003 11:46 AM
|My Cannondale Scalpel team bike came with a double front 44/29T. In my opinion for XC the 29T small ring combined with a 12-32 cassette is almost an ideal replacement for the 32 and 22 rings of a triple. Less shifting necessary at the front is beneficial as well.|
|Sure, you can do it...||russw19|
Dec 12, 2003 1:00 PM
|And when they first hit the market (2 years before Shimano made 9 speed shifting) Ritchey's 2x9 system was a super popular upgrade for many racers. For most people who are in shape and race, 18 gears is plenty off road unless there is some super sick climb (which in mountain races, you can get off the bike and run up the hill if it's that bad) or super sloppy. Many cyclecross riders are now using a single chainring, and Marc Gulikson even won a few races on a single speed cross bike.
So yes, you could build a very nice light 2x9 hardtail. I had one a few years back that was a 2x8 XTR bike that with a Rock Shox SID weighed under 20 pounds. Here's how I built mine... just substitute a few things for the 9th cog, but that's simple.
I had an XTR crank and just removed the inner ring and changed to a shorter bottom bracket to move the crank in. (It was square tapered 8 speed stuff so it was easy to find the BB) and I used a Syncros Ti BB. 8 speed Dura-Ace chain and 12-27 cassette, XTR mid-cage rear derailleur, normal XTR front derailleur, right XTR 8 speed rapidfire shift pod, left side I used an old Suntour XC Pro thumb shifter (super smooth and very light) and Paul's levers. It was a sweet bike and being that I live in Florida, got me thru everything I ever rode over. I even used that bike in a 24 hour race in Conyers, GA and was fine with the gearing (but if I remeber right I switched the cassette to a 13-28, minor, one gear shift at the low and high end.)
If you like your frame, then you will have lots of fun with this project.