Question 1

What are the tooth counts for each of the cogs on this cassette?

Accepted Answer

www.sunrace.com/files/catalog/files/470/Specifications%20-%20Cassettes%20MTB%208-Speed.pdf

11 13 15 18 11 18 34 40

Question 2

Will i be able to use this with a 7 speed derailleur if i take out one cog and put the lockring on the 7th cog?

Accepted Answer

5/6/7/8s chains and the spacing between the cogs are all consistent. The shifters and derailleurs will move the same amount for each shift, but only move a set number of increments for index shifting. So long as you set the limits you don't have to remove any cogs you just won't reach them if your shifter has a smaller number of index increments than the cassette has cogs. Use your limit screws to ignore one end or the other of the gear range.

The 7-speed freehub body is too narrow to receive all eight cogs so you could remove the 3rd or 4th Cog if the cassette is not riveted together or riveted to splined carriers. That would give you a 7 speed wide range cassette with a larger jump to the easy side Midway up the cassette what would otherwise perform just fine. The only catch would be if the rear derailleur didn't have the range or reach for a huge rear COG I think the largest you could get away with is likely a 40 tooth first gear.

You should be picking up a higher gear as well, since many 7s cassettes are 12T or 13T cogs!

Question 3

Will this fit and replace the sram 11-34 8sp cassette ?

Accepted Answer

Yes they are consistent.

Question 4

Would this work on a Sram hub, or is it made for Shimano hubs?

Accepted Answer

it will work with shimano compatible freehubs. It will not work with SRAM "XD drive" freehubs.

Item Package Dimensions L x W x H	8.07 x 7.09 x 1.93 inches
Package Weight	0.56 Kilograms
Item Dimensions LxWxH	8.1 x 7.1 x 2 inches
Item Weight	1.05 Pounds
Brand Name	SunRace
Warranty Description	Limited Warranty
Model Name	CS-M680
Color	Black
Material	Metal
Suggested Users	unisex-adult
Number of Items	1
Manufacturer	Sunrace
Part Number	CSM680 8AX
Style	Cassettes
Included Components	Cassettes
Size	Default

Sun Race CSM680 Cassette 8-Speed 11-40T Black

Description

Specifications

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