DaBomb RL-4 Single Speed Chain Tensioner YGroup_7033445646381 They can be locked using

They can be locked using the same key as the tow ball attachment system

Cranks - If you have a straight 24mm spindle on your cranks choose the Shimano option

Materials: Neoprene cuff

Cons: It isn't the lightest derailleur but for the price does it matter

steerer tubes

DaBomb RL-4 Single Speed Chain Tensioner YGroup_7033445646381 They can be locked usingThe RL 4 Chain tensioner from DaBomb is a simple and reliable fixed chain tensioner for single speed conversions on bike frames designed for cassette and derailleur systems, often referred to as vertical dropout frames. If your bike has a standard 135mm rear end with a Quick Release (QR) skewer type rear axle and you want to convert it to single speed, then the RL 4 from DaBomb gives you a super simple and inexpensive chain tensioner that will prevent