From PAUL:
We took our cult-classic Racer Medium brake, added a roller-bridge and trunion to make it sidepull, and then modified the reach and hardware specifically to fit Brompton folding bikes. This is absolutely the most powerful, best modulating, most adjustable brake you can put on a Brompton!
> Material: 6061 Aluminum
> Weight: 194g
> Finish : Anodized or Polished
> Anodized Color: Black, Purple, Pewter, or Silver
> Cable Pull: Short Pull ↓
> Included Brake Pads: Salmon Kool Stop Thinline