This frame now uses a "mixed taper". This setup uses a standared 1.5" external lower cup (49mm bore) and an internal 1 1/8" upper cup (44mm bore). Almost all headset manufacturers make this product.
100-120mm will work great, depending on what you want the bike to do. 100mm forks will give the bike quick handling and lower standover height. 120mm forks will make the bike more stable at speed and are better for slightly more aggressive riders. 120mm is the largest we recommend.
7.875”x 2” (200x50mm)
Size small Superlights use a 6.5” x 1.5” (165x38mm) The shock mounting hardware for all frame sizes is 22mm wide with an 8mm through hole.
The Superlight uses a 30.9mm seatpost. Make sure it is always inserted a minimum of 4” (100mm)
34.9mm (supplied with frame)
A shimano 34.9 top swing/ top pull. Anything but saint should do the job.
The superlight uses a 68mm bottom bracket shell, and a 50mm chainline. Pretty much any of the newer external bottom bracket cranks will mount up without issue. The Truvativ stylo and shimano Deore XT are our favorites. If you are using an ISIS setup, you need a 68x113mm bottom bracket.
Most 2.3.” tires will fit in there, but that is about the max.