2pcs Bicycle Chain Tensioner Adjuster Aluminum Alloy Chain Fastener for BMX Fixie Bike Single Speed Bicycle

They are built good , but doesn't fit any bike that has rounded axel placement, will have to grind it flat for the chain tensioner to work

The dimensions on this product do not jive with the standard BMX racing frames that are out on the market. Do not buy this product. You will not be able to tighten your back axle to the drop outs. The tongue is 2 mm too thick good idea maybe do your homework next time you wasted my time and my money no good over did not appreciate cannot use either one of the two sets I received

For youth, the smaller stud, not the 14 mm/ Big stud

I put these on my single speed to make it easier to get my chain tensioned correctly. These are really inexpensive, and probably one of the best things I've got for my bike in terms of value.These are very easy to install; they don't even come with instructions, given how obvious it is how these go together. They come with a few different options in screw lengths, so it seems like they would fit just about any bike.These actually made a bigger difference than I would have thought in terms of how well my bike performs, so if you have a bike that these work with, I'd highly recommend them.

They don't sit straight, look bent but works

My Aventon Mataro did not have any chain tugs and there was a slight strip in the thru-axle thread for my rear wheel. This resulted in the lug nut on the drive chain side to slip and not keep the chain tension required and the wheel tilting and catching on the frame.This chain tugs are so simple but effective. I thought they wouldn't fit at first but realized that it's meant to be integrated into the horizontal dropouts unlike some cheaper chain tugs that offset the frame washer. Perfectly fits and seems well constructed. I'll update if they explode while I ride

Could not use on Electra townie as the slot on frame to put the axle bolts opens towards front unlike pictures for product and the design does not allow proper fitting to the frame and putting axle nut back on. See picture how the the open end is not where you tighten. Be sure your frame looks exactly like the picture as the design is not universal for single speed bikes . Should have had a clear warning in description how it not an universal product. Can't return since it was past the return window when I tried to install.

They work