8 Speed Cassette 11-42T 11-40T MTB Cassette 8 Speed Fit for Mountain Bike, Road Bicycle, MTB, BMX, SRAM, Shimano

Nice cassette and looks swell too! Don’t have much mileage on it yet, will update only if there’s a quality issue in that regard.If you are upgrading from a smaller cassette be aware you’ll need a derailleur extender to keep the idler from bumping into the larger diameter outer gear. They aren’t expensive and easy to install. Might need a little longer chain as well.

I have this on a bike that gets plenty of use, commuting and crap weather riding. I have been through one chain on it and it's still going. The shifting isn't Ultegra by any means and the gaps between gears are quite noticeable in places but it's perfect for me. It's been quite solid and reliable and has the range for my ghetto 1x setup to work really well. I just got another one so I have a spare on hand when I kill it. I'm hoping to get two more chains out of my first one. Good value cassette.

In all fairness I am using this on a 2kW emtb ebike which is probably not what it is designed for. This is my second one, the first one wore out on most of the gears in about a month's worth of rough riding. The second one folded like taco after about 5min of testing its ability to hill climb on the lowest gear. Chain alignment was pretty good, so I think I just need a more robust design with something less than 42 teeth.

I have a Shimano Atlus RDM310 8 speed. It interferes with the low gear (largest sprocket).Other cassettes include the goat link you'll inevitably need to make this work with your derailleur. I had to spend another ten bucks to buy one that other derailleurs include for free.I have ordered a goat link. (JGbike Rear Derailleur Link 22mm Hanger Extender).Seller should be aware of this. and inform the buyer.So far I have 100 ft on the cassette so no idea if it will last. I live in a very hilly place. I ride a ten year old mtn bike turned commuter/utility bike (touring tires) so no real off road use for me. Just climbing steep roads.Update: two years later and this cassette is doing great. I have no idea how many miles are on it now. All ebike mid-drive miles though. I am careful to not change gears under power. I ride country roads. Not much off-road. Just wanted the low gear for the steep hills I occasionally ride at walking speeds. With my 42T front sprocket and this cassette and 26 inch wheels, I have a very good ratio spread from zero to about 22 mph pedaling. I have seen higher speeds going downhill motor and gravity assist only. Wheee! Don't worry - the roads where I ride are pedestrian free. My goal was ~15 mph with the ratios to help maintain that target speed. This got it done.

Really nice quality. Great upgrade.