The Bontrager Ion 700 RT is a good front light with a slim design for all but the very darkest of conditions. Offering a good selection of modes and decent battery life, it is great for winter riding and commuting. However the mount could be better and it takes a while to charge
Decent brightness for the size
Difficult to mount on wider diameter bars
Long charge time
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With a claimed maximum output of 700 lumens, the Bontrager Ion 700 RT front light sits at about the brightness you’d expect for a front light of this sort of price. This is more than enough for getting through nighttime commutes, even along the occasional unlit lane providing you know the roads well enough to know where the big potholes are to avoid.
>>> Buyer's guide to cycling lights
The Bontrager Ion 700 RT comes with a choice of five modes: three constant with varying levels of brightness (700 lumens, 450 lumens, and 200 lumens), and two flashing modes (one standard and one irregular that’s sure to catch the attention of even the most inattentive motorist).
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These varying modes also mean varying battery life, ranging from 40 hours on the irregular strobe down to an hour and three quarters on the highest setting – not too bad considering the compact body and the lack of external battery pack. Charging is also nice and easy thanks to the micro USB port, although the five hour charge time is a little lengthy.
>>> Best front lights for around £100 (opens in new tab)
The single LED light contained within a really compact body, that’s nice and light (pardon the pun), and easy enough to slip into your back pocket once the sun comes up and you don’t need it clogging up your cockpit.
The Sync bracket mount is also nice and secure, and I didn’t have any problems with the Bontrager Ion 700 RT moving when I hit potholes. However, the rubber strap that goes around the bars is far too short, making it a real struggle to attach to oversize 31.8mm diameter bars, while you can forget it if you’re running aero bars.
>>> Buyer's guide to rear lights
One nice feature is the ability to control this light wirelessly alongside other Bontrager lights using ANT+. This can be done through a Bontrager Transmitr remote (available separately for £49.99), which attaches to your bars and can control up to seven lights. Perfect if you want to look like a Christmas tree.
For more details head over to the Bontrager website (opens in new tab).
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Henry Robertshaw began his time at Cycling Weekly working with the tech team, writing reviews, buying guides and appearing in videos advising on how to dress for the seasons. He later moved over to the news team, where his work focused on the professional peloton as well as legislation and provision for cycling. He's since moved his career in a new direction, with a role at the Department for Environment, Food and Rural Affairs.
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