Cannondale’s single-legged Lefty fork has only been available for non-Cannondales for a year, since the introduction of the LFA (Lefty For All) range. The telescopic single leg uses a keyed design and fixed tapered axle for good on-trail steering and braking stiffness at a very low weight.
The offset fork is compatible with 1.125 and 1.5in head tubes, but does require a dedicated wheel (Lefty hubs are £75). Loosening the brake to remove the wheel is a faff, and left knee clearance out of the saddle could be an issue, but you can fix punctures with the wheel in-situ.
The 88 needle bearings give a supple, ground-tracking start to the 140mm RockShox-derived air spring stroke. PBR damping is consistent and controlled with a presson, snap-off lockout/rebound adjuster below bar level. It’s pretty linear in standard form so braking dive is an occasional issue, but it can be tuned internally. Cost is high though.
This article was originally published in What Mountain Bike magazine.