- Top Choice for rookies. The old dream pairing reunited. Rapid Rob uses the former profile of Racing Ralph and for many years it has proved an attractive entry-level model. **Features:** * PROTECTION: K-Guard - a layer of natural rubber, reinforced with Kevlar fibres * SIDEWALLS: LiteSkin which offers light, thin sidewalls, for weight saving and reduced rolling resistance * COMPOUND: SBC (Schwalbe Basic Compound) a versatile quality compound for all applications * TPI: 50 TPI * WEIGHT: 26x2.10 650g / 26x2.25 720g / 27.5x2.10 680g / 27.5x2.25 750g / 29x2.10 725g / 29x2.25 790g **ETRTO:** * SCM810A: 54-559 * SCM811A: 54-584 * SCM812A: 54-622 * SCM813B: 57-559 * SCM813W: 57-559 * SCM814A: 57-584 * SCM814W: 57-584 * SCM815A: 57-622 * SCM815W: 57-622