ZTTO MTB 12 Speed Cassette Xd 9-50t Ult Ultralight Cnc Freewheel Rainbow Golden Flywheel 12speed Sprocket 12s K7 Colorful Ult Bike Bicycle Parts

XD Compatible ONLYRatios: 9-11-13-15-18-21-24-28-32-36-42-50TMaterial : High strength steel (9-42T) and 7075 Alloy(50T)please install it with 40N.mWeight : about 375g / 397g proColor : black-gold/rainbow (everyone is different)M7100 +ZTTO 12s Gold Chain + ZTTO 9-50T ULT in the video. you can use any 12 speed chain. The latest version 50T is changed to black color, Compared to the gray 50T version, we adjusted a bit of the shift design to optimize performance and strength.Lock ring updateThis update does not affect performance, no matter which version you receive. The new version mainly increases the contact area with the tool.ZTTO Ultimate seriesZTTO Cassette offers a larger range, more value and lighter weight than the competition. Now, our ULT cassette has an improved structure for smoother shifting.9-50T 556% RANGEThe new ZTTO 9-50T cassette weighs in at 375 grams, and has a 556% gear range.For comparison, SR's 10-50 tooth X01 cassette weights 360 grams with a 500% gear range, cost about 17000PHP.while Shi's 11-51 tooth cassette weighs 367 grams with a 510% gear range. cost about 15750PHP.What is the difference between ULT and ULT pro?The ULT pro, chain will not fall when the pedaling back. Increase 50T thickness to accommodate greater pedaling power.(sure, that cause to added a little weight)9T ! We did it9T not only increased the range, but also reduce the weight of the system, because there is a greater range allows you to use a smaller chainring, also reduces the risk chainring hit stone.Write at the endNo matter what cassette you use, first, make sure the derailleur hanger is straight. you can use a hanger alignment gauge to check. In fact, many people know this, but when we get the new cassette, we couldn't wait to install it, so we forgot to check it, why are we reminding you here? Because this situation just happened, a buyer, he said that the cassette of other famous brands can work normally, but ours can’t. We discussed this for a long time, and finally we found out that it was caused by the bend of the hanger, which was interesting. When we find that some famous brand cassettes can still be used when the hanger is bent! (of course, not perfect, there is some clarking noise) it is always difficult to admit that others have done well, isn't it? That’s ok, we will continue to work hard and improve product performance, now we can guarantee that our products work good as well as famous brands under normal conditions. Thank you for your support :) Best regards.Note*Color: Due to the light or display difference, the color of the product you received might be a little difference from the pictures. That is not a quality issue.*Size & Weight: Due to the measure error or insrumental error, the weight and size of the product might have a minor difference to the discription. That is not a quality issue too.*Service: We are professional bike mechanics and good at English, so if you have any problem when you set