Super light , design for mini/Folding/road bicycle,the rear hub's 2:1 spoke holes, excellent overall energy efficiency. why use a 2:1 spoke ratio? when you push on the pedals, the rotational force on the sprocket induces a slackening of the freewheel spokes with a consequent loss of rim tension. this results in undesirable flex of the whole wheel and an unavoidable loss of energy. the 2:1 Spoke Ratio system has solved this classic cycling problem.

Important note: for the explanation of common abbreviations, please check the specifications you need before buying. If you are not sure how to choose, please consult our professional salespersons, and we will give you accurate suggestions. We are not responsible for the losses caused by your own purchase mistakes.

20/24H = the hub has 20 spoke holes/24 spoke holes, can fit your 20/24 holes rim.

QR = quick release version = front 5x74/5x100/rear 5x130mm = front 9x74/9x100/rear 10x130mm

HG=the hub's cassette body is compatible with Shimano road 8-11 speed cassette and Sram MTB PG series 8-11 speed cassette(HG)

NOTES：

If you need a special combination or size,but can not find a suitable option in the purchase link,or you don't know how to choose the right specification for your bicycle,don't worry,please contact us any time! (note message/WeChat/WhatApp/Email)