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

New: Take Part in the November Giveaway for a Chance to Win a Hybrid E-Bike Worth $1329


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
 
1,075
09-01-2024, 03:20 AM
Last Post: Talha
 
9,831
11-07-2011, 07:55 PM
Last Post: Sparkie
 
10,515
04-12-2011, 07:25 PM
Last Post: Dvntie
 
8,621
01-25-2009, 11:25 PM
Last Post: Barry
 
Guest
9,627
08-18-2008, 04:59 PM
Last Post: Alex Ramon

Forum Jump:

[-]
10 Latest Posts
What was your favourite bicycle?
Today 03:44 PM
Traveling to texas
12-10-2024 10:06 PM
Remedies for contaminated disc rotors
12-10-2024 07:29 PM
Gears and derailleur misalignment
12-10-2024 05:15 PM
What was your first bicycle?
12-10-2024 01:41 AM
Andre leducq bike. Any idea on value
12-09-2024 11:51 PM
Pogačar's 2024 dominance
12-09-2024 07:48 PM
Beginner Mountain Biking Tips
12-09-2024 05:55 PM
How often check or change mechanical dis...
12-09-2024 12:44 AM
Looking for Recommendations: E-Trike for...
12-08-2024 10:50 PM

[-]
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. Alexjohnson
35 posts
no avatar 2. GirishH
16 posts
no avatar 3. meamoantonio
11 posts
no avatar 4. Flowrider
10 posts
no avatar 5. Bweighmaster
9 posts