Home > Transmission > Chainrings > 130 BCD 5 Arm

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

Name: Thorn 130mm BCD Double to Triple Conversion Chainring - 38T
Brand: SJS Cycles
SKU: 9736
Price: 29.99 GBP
Availability: InStock
Rating: 2 (1 reviews)

Customer Reviews (1)

2 / 5| Write your review

£29.99

was

£29.99 was

Manufacturer :

SJS Cycles part number :

Manufacturer part number :

Details

Any 74mm PCD chainring will fit to this adaptor ring, making 130mm PCD double chainsets into triple chainsets.

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Product Reviews (1)

Overall Product Rating 2 / 5

Not Suitable For 10 Speed Setups

By Keith Benton

08 Aug 2016

2 / 5

ConsNot for 10 speed

ProsGood well made product

Bought ring to replace a Stronglight ring which was worn. First impressions were of a solid well made product. That solidity (thickness) was its downfall. The teeth are machined towards the inner side of the ring leavind a wider champer on the outside. The gap so created between the middle ring and outer ring teeth are sufficient for a 10 speed chain to slip between.
It will fit a duraace 7803 set but you have to but a 74bdc inner ring as the DA one is a 90bdc

Questions & Answers (6)

What Is The Weight?

By Eddie

15 Mar 2016

What is the weight?

SJS Customer Service:

Hi,

This chainring weighs 80 grams.

Thanks.

What Is The Actual Colour Of This Chainring?

By Eddie

15 Mar 2016

What is the actual colour of this chainring?

SJS Customer Service:

Hi,

The colour of this chainring is a dull grey.

Thanks.

Is It Made Of Alluminum Alloy?

By Wing

14 Mar 2016

Any bolts and nuts included for the 74 BCD chainring?

SJS Customer Service:

Hi,

This chainring is indeed made from alloy. There are not bolts or nuts supplied I'm afraid, so you'll need to purchase those separately. The correct bolts would need to be standard single chainring bolts and nuts.

Thanks.

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.