Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take part in the June Giveaway for NAKTO Camel e-bike worth $739


Gearing Question
#1
I'm a newbee here, and have a mid/late 90s touring bike with the Shimano RSX components. I got it to use in my first triathlon last summer, and now have done a few. I feel that I'm not getting enough speed from this bike (pedaling at same cadence as others in my highest gear, and still getting passed). Also, I don't use the lowest gear, as even on hills, I feel like I'm just spinning too much and not going forward enough when in the lowest gear combo.
So, my question is: if I replace the crankset to a higher range (currently its 46-36-26), what else needs replacing? Chain? Derailler? etc. I read somewhere that this RSX derailler is "matched" to the 46 tooth large ring?
My concern is that if I need to replace too many components, I may be better off changing to a newer bike for this use.

  Reply
#2
What gear range do you plan to install with the new crankset?

  Reply
#3
I haven't quite figured that out. It seems that the new standard (or maybe the road/race std) is 52-42-x, and I'm not sure what is in between. My goal is to increase speed and I'm trying to figure out if changing out components is the way to do it.

  Reply
#4
G'day
If you plan to use the bike for primarily triathlons, it might be worthwhile asking in related forums what crankset and clusters are commonly used. I don't know much about triathlons but assume that they are mainly flat time trial style rides. Would that be right? If so, I assume the focus is on speed so, a 11-x rear cluster would be desirable and I guess a double or compact double crankset on the front. I wouldn't think a triple is necessary.
Once you have determined this aspect, then you can look to see what other changes are required.
Regards<br />
Andrew

Aushiker.com
@Aushiker on Twitter

A broken clock is correct twice a day
  Reply
#5
You should be able to buy individual chainrings for the RSX cranks. This may be cheaper than buying a whole new crank. Especially if your LBS has some miscellaneous ones lying around. It may be a good way to try going up to a 48-50-52 to see how you like it.
The fr derail is probably designed for the smaller 46 ring. But you may still get OK shifting with it. You'll have to move the derailleur higher on the frame to clear the new ring and readjust. But I'd try it, before spending money on a new one.
depending on what you have in the back, it may be easier to get smaller cogs there than mess with the front. Remember that a 1 tooth change on the back has a bigger impact than 1 on the front.
If you do go substantially bigger in the front, you may need to lengthen your chain, or at least be very careful to avoid the big/big combination. Also if you have a lot of miles on this bike, you may get slipping after changing just one part of the drivetrain as all the parts "wear into" each other.
But I'd play with this one a little with cheaper parts to get a feel for what you like. Then splurge for a real race bike when you've narrowed down what you want.

  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
7,587
11-07-2011, 07:55 PM
Last Post: Sparkie
 
8,117
04-12-2011, 07:25 PM
Last Post: Dvntie
 
6,935
01-25-2009, 11:25 PM
Last Post: Barry
 
Guest
7,332
08-18-2008, 04:59 PM
Last Post: Alex Ramon

Forum Jump:

[-]
10 Latest Posts
Old Shimano cassette..how dismantle ?
Today 12:00 PM
ZULIANI Oria 'helical' tubing 80s
Today 04:28 AM
Need help identifying this frame.
Yesterday 10:19 PM
Helmets these days?
Yesterday 06:27 PM
Electric Bike Safety Tips
07-04-2022 03:56 AM
Hello!
07-04-2022 03:45 AM
Bike Computer /w No Minimum Circumferenc...
07-04-2022 03:40 AM
Rode my First Double Century in June
07-01-2022 10:50 AM
NAKTO Giveaway June 2022
06-28-2022 03:52 AM
NAKTO GIVEAWAY
06-28-2022 12:16 AM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. Jesper
26 posts
no avatar 2. Yevhen
8 posts
no avatar 3. Munich Transfers
7 posts
no avatar 4. ReapThaWhirlwind
7 posts
no avatar 5. aliccon
7 posts