The old speedmerchant ones, and the current Trinity ones are from Bolink actually. Which is now I think out of business or something that would make getting parts from them equally difficult.
The new Speedmerchant tubes are much better than the old bolink ones. The dampening is better and more consistant since each one is machined.
The CRC ones are good except that they can be easily bent. And are rather heavy, and they are one of the highest things up on the car which is not really ideal.
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