1 1/8" Standard Mac Ride Mounting Bracket Spacer
Can you ever have too many bikes?
That's why some of you might like to order extra spacers, so you can pre-install your mounting bracket spacer on as many bikes as you like and swap your seat hassle-free! The mounting bracket weighs only 9g!
1 1/8" is the most common size-- check your bike if you are unsure!