BOLANY Bike 8/9/10 Speed Cassette 11-25T/32T/36T/40T/42T/46T/50T Fit for MTB Bike, Road Bicycle, Lightweight Freewheel, Compatible with Shimano SRAM Sunrace

Had to come back and read other reviews. This cassette is no good. The last few cogs (6-8) are not spaced correctly vs an actual Shimano cassette. It is basically impossible to get clean shifting through out the entire range. The best could get it was to sacrifice gear 8 or sacrifice gear 4. Utter garbage. Needed it for a road bike but simply cannot use this for a race.

Not included cassete spacer at the back

Didn’t fit my bike, had to return it.

Ah the 90's. Well, the late 90's when Shimano went hell bent on ramping up the race of how many cogs would fit on a rear wheel. "9?!" they cried. Well, it was also a time when riders thought a 25 tooth large cog was a "pie plate" (if I could only go back in time with an Eagle cassette). I have always had a spot in my heart for Shimano's 6500 Ultegra group, it was the best looking of the time and dead simple to set-up and use and it was durable. It's not as "finicky" as my 11 speed bikes (No 12 speed yet). Now that I'm a half century old and still riding in the mountains of Colorado, having a bike with an older 9 speed group on it makes it difficult to find proper cassettes to keep my cadence above 12 rpm going uphill. These cassettes are pretty simple, riveted cogs with a nice finish. No extra aluminum spiders or anything like that. I like the "matte" gray vs. a shiny, chrome finish. The description is "super light"...in truth, the weight is totally average and on par with the original Shimano cassettes (I don't recall, but I think mine was in the 270-280 gram range for an 11-28). Performance is completely acceptable for an inexpensive cassette. The finish is a a little rougher than a big brand and I think it's slightly noisier. Shifting performance is more than acceptable and I would say it would be hard to quantify a difference from the original cassette. Once you put a few miles on it, it seemed to quiet down a bit. I only dropped a star due to the "super light" mantra in the title description...this is not a weight-weenie, "super light" cassette. I would imagine these are sold under a variety of brands out of the same factory and that said, they are stamped, steel cogs. My guess would be the majority of them will be good to great quality, but there will be a higher percentage of flawed units out there. If you were to happen to get one, I would just exchange it as you'd have a high probability of getting a good unit in return. Hope this review is helpful and happy riding!

Purchased to upgrade to a wide range 1x setup Shimano drive train. No matter how much fiddling I do, I cannot get the mid-range to shift properly. Its almost as if the cog spacing in gears 6-8 is inconsistent. Will not make an up shift unless you make 2 shifts and then chain jumps 2 cogs. Frustrating because now I'm outside of the return window.Also after a couple of rides in damp conditions the black painted cogs as rusting pretty badly.I really wanted this to be usable for such a reasonable price, but sadly its not.UPDATE: After writing this review the seller has fully refunded the purchase price. Customer service is excellent from this seller.