Adizero Boston 13 vs Noosa Tri 16

Adidas left the Boston 13's ride close to version 12 and put most of the update into comfort, with a padded heel and tongue and a new mesh upper. There's also more Lightstrike Pro sitting above the stiff carbon-infused rods. It's still a firm tempo shoe that's happiest once the pace picks up, and at £140 it's a cheaper way into rod-assisted speed than a proper carbon racing shoe. Its biggest rival is another adidas. Ben Parkes and Fordy Runs both liked the Boston 13, and both reckoned most runners would have more fun in the lighter, softer Adizero Evo SL. The Boston's argument is durability and a steadier platform, so we'd point it at runners who want one hard-wearing pair for workouts and marathon-block long runs. If you already own a Boston 12 you get on with, the changes are small.

The Noosa Tri 16 is Asics at its most playful: a light, lively tempo running shoe with triathlon roots and a deliberately loud look. At 215g with a low 5mm drop, it sits in that sweet spot between a daily trainer and a racer, the kind of shoe you reach for when an easy run turns into a fartlek and you want your feet to feel quick. There is no carbon plate here, so do not expect supershoe propulsion. What you get instead is honest, connected speed: a firm, responsive ride that rewards a forefoot or midfoot strike and turns over fast. The tri heritage shows in details built for racking transitions and shrugging off water, which also make it a genuinely fun stripped-back trainer. We rate it as a speed-day shoe for runners who already have a cushioned daily trainer and want something snappier for tempo work, strides and shorter races. It is not a do-it-all shoe, and it is not trying to be.