MRP Progressive Rear Shock Coil Spring 129mm Long 65mm Maximum Stroke 450+ Pound Spring Weight MPFN-BB MR 17286 LLU MAX-BAG Surly track cogs are threaded

Surly track cogs are threaded the same as a BMX freewheel (1

Tacky finish aids a sticky nonslip surface for ultimate grip in every condition

}Robert Axle Project 15mm Lightning Bolt Thru Axle - Front - Length: 155mm Thread: M14 x 1

Tubeless compatible asymmetric 25mm depth x 26

MRP Progressive Rear Shock Coil Spring 129mm Long 65mm Maximum Stroke 450+ Pound Spring Weight MPFN-BB MR 17286 LLU MAX-BAG Surly track cogs are threadedMRP Progressive Rear Shock Coil Spring 129mm Long 65mm Maximum Stroke 450+ Pound Spring Weight. Progressive Springs utilize a non linear design intended for trail and all mountain enduro riding. They are designed to increase in rate late into stroke to provide additional bottom out support and open up the use of coil shocks on frames previously only suited to air shocks. TECH SPECS Spring Weight 450+