Round TT ring options for Shimano 4 bolt

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prebsy
Posts: 1044
Joined: Tue Oct 23, 2012 10:52 pm
Location: there or thereabouts

by prebsy

Looking for a set of 55/42 chainrings for my elsa RS which uses the shimano 4 bolt pattern. Right now it looks like the only round offerings in this size are DA9000 rings which are pretty pricey and not widely available. Does anyone know of companies manufacturing Round TT rings for the shimano 4 bolt standard?

I know there are plenty of people on the forum with metal working skills :wink:


Edit: It looks like I could pick up a DA inner and a Fiber lyte outer but I'm not sure if that would be durable enough for everyday use. It would still be cheaper than DA inner and outer :thumbup:

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natefontaine
Posts: 249
Joined: Wed Mar 31, 2010 3:37 am

by natefontaine

It may be possible to get the aero 55t Rotor NoQ 110bcd and drill it out for the 4 bolt, and make a cut out for the battery on the crank, that may give the durability you want. Also, there's a 54/42 on ebay now, FWIW

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prebsy
Posts: 1044
Joined: Tue Oct 23, 2012 10:52 pm
Location: there or thereabouts

by prebsy

I don't really have interest in drilling out rings. The response from fiber-lyte was less than pleasing as they don't recommend their rings for road racing. I really would like to avoid the Dura Ace outer ring so I could run a non-shimano groupset.

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