Originally Posted by
DamianW
Xray plastics are soft and flexible but tough.
Yok & TRF graphite parts are stiff and strong but more brittle.
Both have pros and cons, personally I think the yoko plastics are the best in the business.
I ran a BD7 14 last year and after building a T4 15 I agree somewhat with Paul.
The T4 15 screws and belts are IMO poor quality.
Plastics are bound to be softer, and yet stronger than graphite, that's kind of the point
Although you can get the Xray plastic in different hardness ratings.
Graphite is on option parts.
I have used Yokomo rear belts in the past on my T4's as they were cheaper, or available when I was desperate. I honestly couldn't tell any difference between the Yok or Xray belts except for the writing on them.
Skiddins