Manitou makes the X-Firm spring for their variable travel forks but I think it is listed as Firm not X-Firm. It depends on what fork you have. There is always a delay from release to meeting consumer needs with Manitou. It took me 2 years to get a spring for a Black that I had. I rode a Minute 1 for a while but traded out for a Fox FloatRL 100/80. It took a while to get used to the air fork but I'll never go back. I weigh 270 and have had no problems dialing the fork in. As far as variable travel, the Talas rocks and you can find them at pretty good prices. Go to bestbikebuys.com and punch in fox talas. $409.00 right now at Jensonusa.com for the R model. The Talas is stiff, strong, light, and at $409 pretty cheap unless you want compression and lockout. Stay away from the Psylo. I hated mine. Way to much maintenance and it was a pain getting the right springs. They don't make anything very heavy anyway. I bent the lowers in 3 rides too. Good luck.