Cateye Rapid X2 Kinetic Rear 50 Lumen LED-USB Light YGroup_7033470124077 This is the most affordable

This is the most affordable full-featured

the knobs are even longer on the rear

With a concave design and a shoe size specific fit

8 inches wide

These tees give you the comfy feeling of cotton with the technical features of DriRelease fabric

Cateye Rapid X2 Kinetic Rear 50 Lumen LED-USB Light YGroup_7033470124077 This is the most affordableThe Rapid X LED light is a is USB rechargeable with a low battery 'auto save' function that automatically changes the light mode to flash when it gets low to give you an extra hour of light to safely make it home. Specs: 50lm LED Mounts to your seat post (12 32mm) Lithium ion polymer battery Micro USB Attaches to the existing CatEye bracket by using the optional Spacer X 6 modes with memory function High mode1 hr Low mode5 hrs Flashing mode30 hrs