I was hoping that someone could provide me with the precise Shimano road-bike 8, 9, and 10 speed sizes for the following:
- Cassette Spacer Width
- Cog/Tooth Width
- Maximum Chain Width
asked Aug 12, 2013 at 12:39
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1 Answer
I think these may be what you're looking for. FYI, a lot of this information is available with a little searching. Depending on what exactly you are looking for, you might want to look up a document for a specific cassette as the numbers might be slightly different.
Spacer widths (From Shimano tech docs)
- 8 Spd: 3.00mm
- 9 Spd: 2.56mm
- 10 Spd: 2.35mm (1.0mm for lower spacer)
Cog/Tooth Width (From Sheldon Brown)
- 8 Spd: 1.8mm
- 9 Spd: 1.78mm
- 10 Spd: 1.6mm
Chain widths (From wikipedia)*
- 8 speed - 7.1mm (all brands)
- 9 speed - 6.6 to 6.8mm (all brands)
- 10 speed - 6.2mm (Shimano, Campagnolo)
- 10 speed(Narrow, Direction) - 5.88mm (Shimano CN-5700,CN-6700,CN-7900)
*These chain widths are the standard widths, which I assume are recommended. I wouldn't go wider, but a narrower chain will probably work as some chains are cross-compatible.
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3+1 for being generous enough to provide an answer despite the fact that op could have easily have found the answer through Google.– PeteHCommented Aug 12, 2013 at 21:54
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1@PeteH Google won't have it nicely in one place like this. Well, it probably does now, if it points to this question!– KazCommented Jul 22, 2016 at 16:11
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@Kaz People have maintained these lists on web pages for years!– PeteHCommented Jul 22, 2016 at 16:23
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@PeteH, By the way, this morning I used a caliper gauge to measure, down to the micron, a KMC Z51 (which was labelled as a 6-7-8 speed), as well as a SRAM PC-850 (labeled as just 8 speed on the packaging). The both measured quite exactly 7.65 mm, not 7.1, at the widest girth. I wonder whose 8 speed chains actually measure 7.1.– KazCommented Jul 22, 2016 at 20:15
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2Pitty the OP didn't ask for overall cassette widths too. Commented Oct 20, 2016 at 18:26