Sunrace R81 Road Double Chainset w/ Extra 52/42T Rings - 53/39T - 170mm

Question 1

Replacement for Shimano RX100 52/42 chainset

By Bob Shingleton

28 Jun 2020

I want to replace the long obsolete Shimano RX100 52/42 chainset on my Moulton APB 14. This has a 7 speed cassette.
Would it be a straight swap? Or is there a better replacement?
Many thanks for your help and regards from Norfolk.
Bob Shingleton

SJS Customer Service: · Answer

In theory yes this should just swap in, BB needs to be about 107mm axle.

Thanks - 29/06/20

Question 2

Does this come with crank bolts?

By Joe

18 May 2020

SJS Customer Service: · Answer

Hi, crank bolts are not included. Thanks

Question 3

I need a new chainset for a Peugeot cycle, 20 years old, with 2x6 speeds.

By Philip

22 Apr 2020

The bike in question is a Peugeot, 20 years old, with 2x6 speeds. The Sugino cranks on both sides have major cracks in them, and so I need to replace both sides. All else is in good order. The chain wheels are integral, and have 52 and 39 teeth.

The bottom bracket shaft has tapered square ends with threaded studs. The length of the shaft less the studs is about 130 mm.

It looks as if a set you are advertising will suit. Do you think this would be so?

(I have recommended by a cycle shop that a Sunrace FCR810 should be a suiteable replacement.)

Does the set come with the left crank? If not, would you be able to supply, and how much.

I will also need a removal tool. Would you be able to supply, and how much if so?

Thank you.

SJS Customer Service: · Answer

the Cotterless Crank Extractor with 14 mm Crank Socket (SJS Cycles part number : 8129) will fit SR cranks and this chaiset is JIS square so it will fit your Japanese bottom bracket BUT 130mm sounds long for this more modern chainset RT 27/04/2020

Question 4

Is there a black version of this crankset?

By John Watson

16 Apr 2020

SJS Customer Service: · Answer

Hi, this chainset is only available in silver. Thanks 17/04/2020

Question 5

This would fit a Brompton, right?

By mitch

05 Nov 2019

SJS Customer Service: · Answer

Technically yes, but you will likely need to swap the bb and then ensure the bike folds etc.

Thanks - 05/11/19

Question 6

Can this 53-39 chainset go with an 11 speed cassette,and an 11 speed chain?

By Tim Reid

25 Jan 2019

I presently have a 50-39-30 chainset,with an 8 speed cassette,11-12-13-15-17-19-21-23,in which I purchased the cassette from you,the whole system has so far done 10,900 miles and still going,absolutely rock solid.Runs as smooth as silk.

SJS Customer Service: · Answer

R8 2/3 X 8-Speed Crankset
it won't be suitable for 11 speed cassette
many thanks
28/01/19

Question 7

what length bottom bracket does sunrace r81 chainset need.

By Ian Wilde

31 May 2018

SJS Customer Service: · Answer

Sunrace normally recommend a 107mm bottom bracket which gives a normal road centre chainline of 43.5mm.

Thanks

Question 8

Hi Do you have the chainline measurement to the small ring ?

By Andrew Wride

21 Nov 2017

Could this be used with just the small ring and stack bolts for a fixed gear set up ?
Thanks.

SJS Customer Service: · Answer

Hi,

Sunrace normally recommend a 107mm bottom bracket which gives a normal road centre chainline of 43.5mm so the chainline on the inner ring with this bottom bracket length would be 41mm. In theory it would be possible to use it in this set up but this is not something we have ever tried to be able to say for sure.

Thanks.

Question 9

Width between outer and middle

By Si

12 Jul 2017

Hi what's the horizontal width (as you look down from the top tube to the ground) between the outer and middle chainrings as i want to use the rings for a sora crank (which is a triple)

SJS Customer Service: · Answer

Hi,

The space between the two chainrings is 5mm.

Thanks.

Question 10

Are The Chain Wheels Alloy Thanks

By Anonymous

08 Aug 2016

are the chain wheels alloy

SJS Customer Service: · Answer

Hi, this chainset has alloy crank arms & steel chainrings.

Regards