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Thorn 130mm BCD Double to Triple Conversion Chainring - 38T

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£29.99

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Details

Any 74mm PCD chainring will fit to this adaptor ring, making 130mm PCD double chainsets into triple chainsets. Double chainnring bolts and spacers (3.8mm) are also needed, see linked items.
Weight: 80g

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Questions & Answers (3)

Re Answer To Previous Question

By Tony J

30 Dec 2013

Thanks. It sounds as though this may be a solution to obsolete middle ring for Dura Ace triple. Just one more thing, is this ring ok for 10 speed chain.

SJS Customer Service:

Hi,

Yes the ring should be okay for 10spd.

Thanks.

Re Reply 30Th Dec.

By Tony J

30 Dec 2013

Re your reply of 30th December, on a Dura Ace 7803 triple chainset, the inner ring bolts to the middle ring and ther are no mounting points for the inner ring on the crank.

SJS Customer Service:

Hi,

As your chainset is a triple I assumed it would have normal triple ring fittings, if this is the system that is already in place then this ring should be a suitable replacement.

Thanks.

Is This A Suitable Replacement For A Dura Ace 7803 Ring

By Tony J

29 Dec 2013

As Dura Ace 7803 middle rings are no longer available, would this be an alternative and also buy a new 74 mm bcd inner ring to suit this middle ring.
Also, is this ring suitable for 10 speed chain.

SJS Customer Service:

Hi,

I'm afraid this won't fit your chainset, it designed for double chainsets, if it is used with a triple ring chainset the extra long arms will not fit past the mounting points for the small ring.

Thanks.