Smith Triad MIPS Helmet with Aleck Crash Sensor: 290 g (£150)
The Smith Triad MIPS X Aleck is a road helmet with a built-in crash sensor that sends an alert to a phone app after a crash. We have not tested it. This page collects what Tredz lists and the current price.
Available now: Smith Triad MIPS X Aleck Crash Sensor Road Helmet — £149.99 at Tredz (listed RRP £189.99), correct at time of writing, 21 October 2026.
What the retailer lists
- Crash detection: the Aleck sensor is rechargeable and connects over Bluetooth to the Aleck phone app, which sends alerts if you crash.
- Protection: zonal Koroyd coverage, a MIPS layer and an integrated skeletal structure Smith describes as a roll cage. CPSC and CE EN 1078.
- Ventilation: 19 fixed vents with internal air channels, and AirEvac for Smith eyewear.
- Fit: the VaporFit dial gives 270 degrees of adjustment, with the MIPS layer integrated into the fit system.
- Lining: Ionic+ antimicrobial lining for sweat-activated odour control.
- Weight: 290 g (size M, MIPS).
- Sizes: S 51 to 55 cm, M 55 to 59 cm, L 59 to 63 cm, XL 63 to 67 cm.
Where it fits for triathletes
The points below are our reading of the listed features, not test results.
- Solo riders. A crash alert is aimed at people who ride alone on quiet roads, which describes a lot of triathlon training.
- Phone needed. The sensor works through the Aleck app, so check how alerts reach your contacts before relying on it.
- Price. At £149.99 it is £40.00 below the RRP.
- Price. At £149.99 it is £40.00 below the RRP.
Where to buy
Tredz lists the Smith Triad MIPS X Aleck Crash Sensor Road Helmet at £149.99 at time of writing, and the link below goes to the same product page.
Related guides
See also our best cycling helmets for triathlon training guide and the POC Ventral MIPS page.
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