FINALLYFLYING

Hi all, new member here.

My LBS no longer works on 10 speed bikes so I’m having to learn to do my own maintenance and repairs.

I need to replace my chainrings and am finding the various part numbers confusing. The chainring is Ultegra, 10 speed, 53-B.

But there are numerous 53T, 130mm Ultegra chainrings with different part numbers, e.g., 6700-G, FC-6700, 6600 and then different colors on top of all that (silver, glossy gray, etc.)

As long as it’s 130mm and 53-B Ultegra are all these other part numbers interchangeable?

Thanks!

cb400bill

Pic Assist - https://www.bikeforums.net/g/picture/23583525

cxwrench

What kind of bike shop is this? That's crazy.

70sSanO

I’ll need to look up the chainrings on the Shimano site. I believe you have an FC-6600 crankset.

SG designation stands for SuperGlide. I know some older 90’s rings had an A, B, or C. I “think” the rings you need are designated SG-X.

There are also matched chainring sets A and B: 52A, 50A, 42A, 53B, 39B.

The matched chainrings are designed to shift better, A’s together or B’s together. Although it is not necessary to match.

So I think you need an SG-X with 53B and 39B if you want the same.

John

squirtdad

my thoughts exactly

squirtdad

it will be difficult to find new exact replacements as the have not made for a while.

First thing to look for a new bike shop.

OP is correct need to look for 130 BCD chain rings in 53 and 39 BCD: Bolt Circle Diameter.

Newer "compact" cranks and chain rings are 110 BCD
these are likely to work
https://www.benscycle.com/shimano-10...24849_cr5728/p

https://www.benscycle.com/shimano-10...24849-cr5724/p

Racing Dan

As far as I know fc-5700 (105) rings are still available in 130 bcd and same 53/39t config. Not too expensive either. I cant think of any reason they would not fit? (EDIT: as already mentioned above)

Note, the rings named fc-5750 are 110 bcd and wont fit the crank.

FINALLYFLYING

Thanks all for the great information and thanks to the mod for uploading the picture for me. You’re right, it does say SG-X on it.

I’ll see what I can find online today.

I think I’ll call some other shops too. I’ve used my current shop for several years and been very happy with them, but he led me to believe that “nobody” works on 10-speeds anymore and from the comments above I’m thinking that’s not the case?

Thanks again!!

squirtdad

A good shop should be able to work on anything from 5 speeds to 12 speed IMHO.

Good shops would keep up with current technology, but not abandon older technology. (They may not have older parts on hand) ,

70sSanO

Here is the Shimano Tech Doc for your crank...

https://si.shimano.com/api/publish/s...6600-2365E.pdf

A "good" shop can advise you what else will work. If you are hard pressed to get the chain rings you can find them on eBay, but maybe not as cheap as elsewhere.

Also, now is a good time to evaluate your drivetrain as to how you like the setup. Is the 53t (tooth) outer ring a good match for your riding style or would you be better off with a 50t or 52t. Only you can determine if you want to stick to the same ratios or change.

Good luck!

John

Dave Mayer

The bike Co-op that I wrench at rarely sees 10-speed bikes because these are too modern to be donated to us, or expensive to be ridden by our clients.

We work on mostly 7-speed era 26" wheel mountain bikes (no suspension), which are the perfect utilitarian bikes, and seemingly last forever. We have no problems sourcing new 6 and 7 speed parts from our suppliers.

Chainrings: unless you are a clone of Andrei Tchmil, you'll wear out 3 little rings for every big ring. So just replace your 39t ring for now. Of course, you'll be wearing out 3-4 chains for every set of rings. Buy cheap chains and replace often.

The small ring in a double setup is far less finicky and demanding than the big ring. Unlike the requirement for pickup ramps and pins on the big ring, the only thing the little ring does is to take torque and spin around. I have replaced many many small rings on double setups; mixing and matching brands, models, and 'speeds' has had little effect on anything. So I suggest any 130 BCD ring from the 9-11 speed era will function interchangeably with what you have.

Time to get on Fleabay or AliExpress and order up a ring. I get wholesale pricing, but it is still cheaper to order direct from the source.

SoSmellyAir

Modern Bike has the best prices on 10 speed chain rings. I have bought two sets (for my 11 speed road bike).

The more recent Ultegra outer rings do not use regular chain ring bolts, so ...

To use the existing chain ring bolts, go 105: Shimano 105 5700 53t 130mm 10spd Chainring Silver - Modern Bike

You can even go down to a 52T chain ring: Shimano 105 5700 52t 130mm 10spd Chainring Silver - Modern Bike

In case you want an inner 39T chain ring from the same generation: Shimano Ultegra 6700 39t 130mm 10spd chainring - Modern Bike

An Ultegra inner chain ring should work just fine with a 105 outer chain ring, but ...

... if you want to pay more for a 105 39T chain ring: Shimano 105 5700 39t 130mm 10spd Chainring Silver - Modern Bike

70sSanO

One last thought…
…unless you already have a new chain and cassette, replace them at the same time. You don’t want to run an old chain on new chainrings. And a new chain with a worn cassette won’t run smoothly.

Start the new year off right.

John

Camilo

It's nonsense, in my experience. Please let us know what you find out when you call around.

jimc101

What exactly is wrong with them?
They look used, but far from worn out. Would be using them for a long time, the 53t will probably out last an inner replacement when this needs to be replaced (which is doesn't really yet)

For the 10 speed thing, this is all terminology, 10 speed used to mean exactly that, 10 gears, 2 up front, 5 at the back, now it means 10 at the back, no reference to the front, although realistically all current 10 speed bikes have 2 up the front.

If your LBS won't work on 10 speed bikes, would avoid them, as either they don't understand bike terminology, and there for bikes in general, or they are limiting themselves to a very small area of the market, as 11 speed and above is still for mid to high end, 8/9/10 speed are still the majority for lower to mid range road bike.

alcjphil

This was also my thought. The irregularly shaped teeth are that way by design, to aid shifting from one ring to the other. Other than being dirty, those rings don't look all that bad to me