Exposure Six Pack Mk15 vs MaXx-D Mk17: Which Triathlon Bike Light Should You Buy?

What to Look For

Exposure’s 2026 range refresh brought USB-C charging, a new colour OLED display, and “Reflex 2.0” auto-adjust technology to every light in the line-up — including the two most powerful front lights Exposure makes. The Six Pack Mk15 and MaXx-D Mk17 sit right next to each other on paper: both are USB-C rechargeable, both get the new display and Reflex 2.0, and both are genuinely serious lights. The difference comes down to output and price — 6000 lumens at £459.99 versus 4850 lumens at £414.99 — and which side of that gap makes sense depends entirely on how and where you ride.

The Six Pack Mk15

The Six Pack Mk15 is Exposure’s flagship: 6000 lumens, £459.99 (RRP £495), and the highest output of any front light currently in the range. It’s built for riders who want the absolute maximum — ultra-distance racers, winter training-camp regulars, and anyone spending long stretches on roads with no ambient light at all, where more lumens genuinely change how safe and confident you feel. It’s also the pricier of the two, and for most riders it’s more light than they’ll use on a typical commute or early club run.

Check price on Tredz — Six Pack Mk15

The MaXx-D Mk17

The MaXx-D Mk17 gives up 1150 lumens against the Six Pack Mk15 — 4850 versus 6000 — for a saving of £45, at £414.99 (RRP £445). For the large majority of triathletes, that’s an easy trade: 4850 lumens is still a very serious amount of light, more than enough for regular winter commuting and early-morning training rides on lit or semi-lit roads, without paying flagship prices for output you won’t fully use. It carries the same USB-C charging, colour OLED display, and Reflex 2.0 auto-adjust as its more expensive sibling — you’re not giving up any of the 2026 range’s headline upgrades, only outright brightness.

Check price on Tredz — MaXx-D Mk17

Verdict: Which Should You Buy?

Buy the Six Pack Mk15 if you’re doing genuinely unlit, long-distance winter riding where maximum output matters more than the extra £45 — ultra-distance training, remote roads, or conditions where you want more light than you think you’ll need. Buy the MaXx-D Mk17 if you’re a regular early-morning or winter commuter on roads with at least some ambient lighting, where 4850 lumens is already more than most riders use, and the saving is worth more than the extra headroom. Either way, you’re getting the same 2026-range upgrades — USB-C charging, colour OLED display, and Reflex 2.0 — so the decision really is just about how bright you need to go. If neither quite fits, our review of the 3850-lumen Exposure Toro Mk16, also part of this same 2026 refresh, is worth a look as a third option, and pairing either light with a helmet-mounted Exposure Zenith Mk4 adds cornering visibility that a fixed handlebar light can’t match on its own.

See our guide to the best triathlon bike lights for early morning training for the full field of options, including these two.

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