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A modular helmet, called flip-up in the UK, keeps its chin bar attached, while ILM options use an open-face shell with a removable chin bar. BigBike stocks ILM and LS2 in Ho Chi Minh City. Foreign riders should check head shape, closure movement, shield setup, and certification in-store.
FF901 keeps its chin bar on hinges and rotates it over the shell. HS711 and Z302 use removable chin bars. Once detached, each helmet returns to its open-face base. The mechanism is the key distinction. With either layout, a rider can stop along the road to drink, ask directions, or pay for fuel without taking the entire helmet off.
These designs suit riders who stop often. Raising or removing the chin section lets them handle a stop without taking off the whole helmet. The ILM models here start from open face shells and do not suit riders who put chin coverage first. A fixed, molded full face helmet is the clearer choice for that priority. A modular or convertible helmet reduces head injury; it does not remove the risk.
FF901 carries ECE 22.06 with P/J dual homologation according to the manufacturer. Its closed and raised positions are covered by that testing. At higher speed, close the chin bar to reduce wind force and noise. The ILM models follow open-face certification for their base configuration. Their detachable pieces should not be read as molded full face chin protection.
BigBike checked genuine labels showing DOT and ECE 22.06 on the ILM helmets. On the Z302, the certification label sits at the rear neck area. The box lists size L for 59-60 cm, yet our 59 cm in-store tester found it tight at the cheeks and shallow at the crown. The LS2 specification carries P/J for closed and raised positions. Check the helmet itself, not only the brand.
HS711 runs small, so a larger head should treat its listed size cautiously and consider sizing up. The other ILM model is round oval, with a large shell and a male-leaning shape. Try the shape in-store. Weighed in-store, Z302 size L with shield is 1,478g, while HS711 is 1,403g. Do not rank them by weight because the two readings are not from the same size.
HS711's mirrored goggle-style shield lifts under the peak, but no clear shield is included, so the view stays dark at night. Z302 has a replaceable dark face shield and removable liner. Its speaker pockets leave space for SCS, while BigBike has fitted SCS only to FF901. The LS2 model combines a drop-down sun visor, Pinlock-ready face shield, removable liner, and micrometric buckle. Ask whether the Pinlock insert is sold separately. Operate the chin section several times with gloves.
BigBike has operated since 2014 at 79/30/52 Au Co, Hoa Binh Ward, Ho Chi Minh City. Staff weigh helmets with shields, check rear labels, remove and refit chin pieces, then let riders try them on and work the mechanism with gloves. This exposes pressure and handling a sizing chart misses.
A modular helmet, called flip-up in the UK, keeps its chin bar attached, while ILM options use an open-face shell with a removable chin bar. BigBike stocks ILM and LS2 in Ho Chi Minh City. Foreign riders should check head shape, closure movement, shield setup, and certification in-store.
FF901 keeps its chin bar on hinges and rotates it over the shell. HS711 and Z302 use removable chin bars. Once detached, each helmet returns to its open-face base. The mechanism is the key distinction. With either layout, a rider can stop along the road to drink, ask directions, or pay for fuel without taking the entire helmet off.
These designs suit riders who stop often. Raising or removing the chin section lets them handle a stop without taking off the whole helmet. The ILM models here start from open face shells and do not suit riders who put chin coverage first. A fixed, molded full face helmet is the clearer choice for that priority. A modular or convertible helmet reduces head injury; it does not remove the risk.
FF901 carries ECE 22.06 with P/J dual homologation according to the manufacturer. Its closed and raised positions are covered by that testing. At higher speed, close the chin bar to reduce wind force and noise. The ILM models follow open-face certification for their base configuration. Their detachable pieces should not be read as molded full face chin protection.
BigBike checked genuine labels showing DOT and ECE 22.06 on the ILM helmets. On the Z302, the certification label sits at the rear neck area. The box lists size L for 59-60 cm, yet our 59 cm in-store tester found it tight at the cheeks and shallow at the crown. The LS2 specification carries P/J for closed and raised positions. Check the helmet itself, not only the brand.
HS711 runs small, so a larger head should treat its listed size cautiously and consider sizing up. The other ILM model is round oval, with a large shell and a male-leaning shape. Try the shape in-store. Weighed in-store, Z302 size L with shield is 1,478g, while HS711 is 1,403g. Do not rank them by weight because the two readings are not from the same size.
HS711's mirrored goggle-style shield lifts under the peak, but no clear shield is included, so the view stays dark at night. Z302 has a replaceable dark face shield and removable liner. Its speaker pockets leave space for SCS, while BigBike has fitted SCS only to FF901. The LS2 model combines a drop-down sun visor, Pinlock-ready face shield, removable liner, and micrometric buckle. Ask whether the Pinlock insert is sold separately. Operate the chin section several times with gloves.
BigBike has operated since 2014 at 79/30/52 Au Co, Hoa Binh Ward, Ho Chi Minh City. Staff weigh helmets with shields, check rear labels, remove and refit chin pieces, then let riders try them on and work the mechanism with gloves. This exposes pressure and handling a sizing chart misses.
