Bell Catalyst MIPS Bike Helmet - White/Silver Size:Medium (55-59cm) 2mm Bell Diameter： φ33mm Weight：

2mm Bell Diameter： φ33mm Weight： 27g

Fits 2″: yes

Reid alloy 27

Lighter than a carbon bottle cage

35mm tire clearance permits the use of plusher

Bell Catalyst MIPS Bike Helmet - White/Silver Size:Medium (55-59cm) 2mm Bell Diameter： φ33mm Weight：For riders looking for a lightweight, well ventilated helmet that's all about going fast on trail rides, the Catalyst mountain bike helmet brings an engineered fit and modernized, rounded shape that looks as modern as it feels. Add to this No Tiwst Tri Glide strap yokes, MIPS rotational impact system, and a removable visor and all you need is trail. Features Float fit Fusion in mold polycarbonate shell Lightweight straps Mips equipped No twist tri