This bottom bracket is for use with a non threaded road bike BB shell, that measures at a width of 68 mm and a shell inner diameter of 42 mm, when you have a 30 mm crank spindle you want to use with your bike. We have a full run of bearing options in this platform, angular contact steel through the top of the line XD15. All of these bearing kits will come with C clips, a wavy washer, 5 narrow spacers, and the bearing seals. If you have a Cervelo R5CA frame with a 79 mm BB width - This BB30 will work for you. For your dirt pedal bicycle this can also be the choice for you if you have a 68 or 73 mm shell width combined with a 42 mm inner diameter. This BB will allow you to run a 30 mm spindle to your dirt loving delight. (100% Original with Package) BUY ON Shopee: https://shopee.com.my/ENDURO-BB30-XD-15-BB-KIT-BKC-0600-30MMX42MM-BEARING-BOTTOM-BRACKET-i.78112047.7644470181 Can Whatsapp / Call . https://wa.me/60126960321 Vince . https://wa.me/60126105929 Shop . office 03-8060 8967 Operation Hour Monday to Saturday (10.30AM TO 7PM) *Sunday Close* ----------------------------------------------- VK CYCLES PUCHONG Map - https://goo.gl/maps/8y79tAyzkEE2 (LOCATION) No 39, Jalan BP 7/2 , Bandar Bukit Puchong, 47100, Selangor , Puchong Facebook - https://www.facebook.com/SpecialistRepairBicycles/ Instagram - VK CYCLES