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Cam­pag­nolo Record EPS H11 Disc groupset, Time XPro 10 ped­als, Look Keo Car­bon Cromo ped­als, Lazer Bul­let hel­met, Ful­crum R5 Disc wheels, Fizik R1 In­finito shoes and Tifosi Davos glasses

BEL­GIUM’S LAZER SEEMS TO BE BOTH in­no­va­tive and tra­di­tional all at once, a feel­ing the new Bul­let doesn’t dis­pel. The pre­vi­ously range­top­ping Z1 has 31 vents, but its aero cre­den­tials rely on fit­ting an ex­ter­nal shell to cover them up. By con­trast, the Bul­let has four large open vents along each side, and a cen­tral one con­trolled by a sid­ing cover.

The Bul­let’s Air Slide sys­tem con­sists of a frontto-back chan­nel within the EPS foam, whose fit­tings and vents are shielded by a two-part cus­tomis­able cover. As sup­plied, the rear sec­tion is solid, and the front por­tion has a hexag­o­nal grid pat­tern above four sprung flaps. Slid­ing this rear­wards reveals a vent above the brow, and the flaps open to chan­nel air on to the head.

Al­ter­nate cov­ers are in­cluded to fully ven­ti­late or en­close the cen­tral chan­nel. There’s a brow mount­ing point for Lazer’s op­tional LifeBEAM heart rate mon­i­tor, a rear po­si­tion for its elec­tron­ics, and the hel­met’s ex­ter­nal shell is ex­ten­sive, but it all adds mass – our large size weigh­ing 349g.

Com­pared to the Z1’s round shape, the same sized Bul­let feels nar­rower, and we found its shell cre­ated some tight­ness on the up­per rear part of the head. The old Roll­sys re­ten­tion sys­tem makes way for a new dial-op­er­ated setup, which is se­cure, if a lit­tle bulky.

With the Air Slide closed, there’s rea­son­able cool­ing, but we found the side vents to be ex­tremely cold in low tem­per­a­tures, a time when more en­closed hel­mets are usu­ally a boon, and the Bul­let’s vol­ume pre­vented us from squeez­ing a skull cap be­neath. Mov­ing the Air Slide on the go is harder than ex­pected, as it doesn’t slide eas­ily, and grip on the cover is lim­ited. Once open, the ad­di­tional air sup­ply is ob­vi­ous, but the top of our head re­mained warm. Sur­pris­ingly, the top flap just di­rects air be­tween the EPS and up­per cover to exit from the back, lead­ing to dif­fer­ing tem­per­a­tures and re­duced com­fort.

Lazer claims some worth­while aero­dy­namic drag re­duc­tion fig­ures, ap­par­ently sav­ing 7-12 watts at 45kph in open or closed con­fig­u­ra­tion, when com­pared to the non-aero Z1. There’s much to like about the Bul­let, its style, fea­tures and aero claims are cur­rent, but the need for ef­fec­tive cool­ing and univer­sal fit hasn’t been met in the way Lazer’s hel­mets usu­ally do.

WE SAY The Bul­let looks great and feels fast, but doesn’t pro­duce con­sis­tent all-over cool­ing

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