new cassette difference between 7800 and 7900
Moderator: robbosmans
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7900 has a little more machining. most evident when looking at the back of the spider. also available in a greater range of sizes (11-25, 11-27, 11-28, etc)
7900 Product page
7800 Product page
Looks like about 10g weight difference for the 11-23, 7800 cassettes that start with 11t only have 3 Ti cogs, & the 7900 has more size options.
7800 Product page
Looks like about 10g weight difference for the 11-23, 7800 cassettes that start with 11t only have 3 Ti cogs, & the 7900 has more size options.
thanks all for the replies , I've been using the 7800 and it shifted very well until it and the chain wore , bought a new kmc chain and was hoping it would shift ok with out changing the cassette but tis not the case ., the 4 ti gears are worn and the shifting is slugish there , after reviewing the product page I think I will buy a new 7800 ,it's 10 gr more but 40.00 less .thanks all for helping me with this question . cheers
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