Shimano Dura-Ace CS-7800 Low Spacer - 1.0mm - Y1Z807000

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For use with Shimano Dura-Ace CS-7800 10 speed 11-21T, 11-23T, 12-21T, 12-23T, 12-25T & 12-27T cassettes.

This Low Spacer can also be used on the following cassettes:

- Shimano Dura-Ace CS-7900
- Shimano Ultegra CS-6700
- Shimano Ultegra CS-6600
- Shimano 105 CS-5700
- Shimano 105 CS-5600

These are an "A" match which indicates that the parts are the same in materials, appearance, finish & size etc.

These cassettes require the Shimano TL-LR15 Lock Ring Removal Tool.

Genuine Shimano replacement part.
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Questions & Answers (3) Q & A
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Product Reviews (1)
Overall Product Rating 5 / 5
Fitting 9 Speed Cassette To 10 Speed Hub
By Anonymous
18 Nov 2011
5 / 5
I recommend this product
ProsDoes what its meant to
Bought this so i could fit a 10 speed cassette to a 9/10 speed hub. Does what it say on the tin!
Questions & Answers (3)
Deore T610 hub CS500-10 cassette
26 May 2018
Can this spacer be fitted to use the 8/9/10 Deore FH-610 hub with the 10sp CS500-10 cassette?
Hi there,

If you are fitting a 10 speed cassette to the FH-610 hub, you will not require any spacers.

Hi! Could You Tell Me The Inside And Outside Diameter? Thank You!
26 May 2017
I want to use it as 1mm spacer on the freewheel for a 1995 HG Cassette. The original part had the strip pattern of the casette, but as long as the inside is 35 mm it may do the job. May be you have also the original style part ? Thank You.

The inside diameter of this spacer is 34.5mm and the external diameter is 39.5mm.

1.0Mm Cassette Spacer
04 Jun 2014
Will shimano dura ace cs7800 1.0mm cassette spacer work with cs6700?
Is it a low spacer?
Thank's for the answer in advance.

Yes it is a low spacer and is the exact same one as used with the CS-6700 cassette.