chainring

[andrewsdad]

Hi guys, having picked your very knowledgeable brains earlier, having changed my rear cassette 12/25, ive noticed my front 50t chainring warped, will any 50t ring do or do I need to take the origional to my lbs. Many thanks guys.

 

[adamhearn]

For chainrings you need to match up the number of bolt holes and the distance between them. It's most likely a 5 hole 110 BCD config... If you're buying from a LBS then best plan is indeed to take the old ring with you.

Here's a PDF with a section that describes the sizing

 

[andrewsdad]

For chainrings you need to match up the number of bolt holes and the distance between them. It's most likely a 5 hole 110 BCD config... If you're buying from a LBS then best plan is indeed to take the old ring with you.

Here's a PDF with a section that describes the sizing

Evans seem to have reasonably priced rings. Thankyou for the reply.

 

[andrewsdad]

For chainrings you need to match up the number of bolt holes and the distance between them. It's most likely a 5 hole 110 BCD config... If you're buying from a LBS then best plan is indeed to take the old ring with you.

Here's a PDF with a section that describes the sizing

Is it the boltholes that are the only difference.

 

[adamhearn]

A 50T ring is pretty much like any other. Of course, some people want specific brands, some want OEM, some want an upgrade.

Weight, material, cost and colour/asthetics are all choices to make. Spa Cycles do cheap/well thought of rings [from what's been said on forums]. An example being this one.

 

[andrewsdad]

A 50T ring is pretty much like any other. Of course, some people want specific brands, some want OEM, some want an upgrade.

Weight, material, cost and colour/asthetics are all choices to make. Spa Cycles do cheap/well thought of rings [from what's been said on forums]. An example being this one.

Great thanks much appreciated.

 

[slowmotion]

Another vote for Spa Cycles here.

 

[raleighnut]

I'd take the old one to my LBS, much easier to get the right one if you can match em up plus I don't mind paying a bit more to have it in my hands rather than have to wait for a delivery that has been kicked around a dusty warehouse and stood on ......Twice carefully delivered to my door by a smiling man who never touched it without gloves on.

 

[cyberknight]

Another vote for Spa Cycles here.

And another
I changed both my inner rings to 36s with a 50 outer ring and it makes the drop to the smaller ring less of a "spin like a nutter ".

 

[byegad]

+1 for Spa Cycles. I've bought rings from them and their telephone advice is spot on!

 

[robjh]

Similar to the OP, I have changed chain and cassette and this has shown up how eroded my middle chainring is, and the large one is not in the best of shape either.
It's a Shimano Sora 50-39-30 triple, and I can replace the 50T and 39T rings for about £50, or get a new 105 crankset for about £100. (I generally run 105 components on the bike, the Sora cranks are a bit of a historical accident).

What are the merits of replacing the whole crankset rather than just 2 chainrings? Do cranks ever (realistically) wear out?

 

[Citius]

I'd be interested in knowing how or why the chainring became 'warped' - it's not something I've ever come across before.

 

[andrewsdad]

I'd take the old one to my LBS, much easier to get the right one if you can match em up plus I don't mind paying a bit more to have it in my hands rather than have to wait for a delivery that has been kicked around a dusty warehouse and stood on ......Twice carefully delivered to my door by a smiling man who never touched it without gloves on.

Lol good point thanks.

 

[andrewsdad]

Another vote for Spa Cycles here.

Thanks

 

[Leaway2]

+ whatever for Spa. I fitted one 6 months ago. Very helpful on the phone and fast delivery.