You had me at "Speed" ...
Always good to have extra high quality spacers and speed rings for my carbon gt.
Love all the evolve accessories the Spacers and Rings fit perfectly on my Bamboo GTX .. you can never have enough spare parts. I have spares of everything from wheels, bearings, gears to belts!
These are an essential necessity for your set-up. Quality is good which is reassuring when cruising at 20+ mph. Price is reasonable and shipping is fast.
These bad boys fit perfectly. Cheap too