RoadBikeReview.com's Forum Archives - Components


Archive Home >> Components(1 2 3 4 5 6 7 8 9 10 )


Need smaller gear than Shimano Triple 30x27(7 posts)

Need smaller gear than Shimano Triple 30x27Derrick VL
Mar 30, 2003 10:17 AM
When I try to climb some famous mountains, I would like to have a smaller gear than the Shimano Dura-Ace triple I have now (front 30, rear 27). What can I do without changing too much components?
New Rear Derraileur, Cogset and ChainIFRider
Mar 30, 2003 10:37 AM
Swap out the rear end for a mountain set. XT will work fine but if you want the nicest get XTR. You can run a 34 in the back if you like. I ran an Ultegra triple with an XT rear der. and a XT 12-34 for a tour in vermont with loaded panniers. Shifting was inpecable.
Can you swap that 30 for a 26 or 24?cory
Mar 30, 2003 9:41 PM
Not sure it will work with DA, but a couple of years ago I swapped the 30 on two (older, non-DA) bikes for a 24 and 26. Worked fine, no other changes. One has almost 4000 miles on it now.
Max capacity rear der 38TDerrick VL
Apr 3, 2003 10:08 AM
The maximum capacity of the rear derailleur is 38 T (www.shimano.com)
Front 53-30 = 23 T
Rear 27-12 = 15 T
This means the derailleur can't take higher cogs than 27, or I have to change other things as well (front/rear).
* replace 12 (possible ?)
* replace 53 (possible with DA front der ?)
re: TA chainringsbattaglin
Mar 31, 2003 9:39 PM
check out peterwhitecycles.com he's got TA chainrings in numerous sizes. he even have a 24t 3rd ring. You probably would have to change the outer and middle rings should you want a 24t 3rd ring as this would not be suitable to the D/A front der. Maybe you can get a set more suitable to your ride than the 53-39-30 combination.
If you get the XT derailleur...KeeponTrekkin
Apr 1, 2003 7:02 AM
You can modify your current cassette instead of buying a new MTB cassette. See Sheldon Brown's website for more details. Harris Cyclery sells individual cogs that are S-compatible. It sounds like you have the 12-27 cassette. You can remove individual cogs or groups that are on "spiders" from the middle and insert or add new ones. E.g. remove the 14 cog and replace it with a big one, e.g. 32 or higher. I'm doing it now on one bike for similar reasons. One of Sheldon's articles addresses what he calls Alpine gearing. It's generally road spacing with a big jump to a real granny. Sheldon says it's far more useful than you might first think. It's basically what I'm doing and I confess to a case of "tinkeritis".

KoT
Max capacity rear der 38TDerrick VL
Apr 3, 2003 10:05 AM
The maximum capacity of the rear derailleur is 38 T (www.shimano.com)
Front 53-30 = 23 T
Rear 27-12 = 15 T
This means the derailleur can't take higher cogs than 27, or I have to change other things as well (front/rear).
* replace 12 (possible ?)
* replace 53 (possible ?)