Kiprun KD 900 Review: Decathlon's Fast Trainer That Punches Above Its Price

Introduction

The Kiprun KD 900 from Decathlon is a lightweight PEBA shoe built as a fast trainer, and it is designed to sit alongside the brand’s carbon plate shoes, the KD 900X and the forthcoming KD 900X LD. It is a speed-focused shoe with enough range to work as a bit of an all-rounder.

It costs £99.99 in the UK and $120 in the EU, weighs 238 g (8.4 oz) in a UK size 9, and has an 8 mm drop. Decathlon does not publish the stack height, but the heel is fairly high with a decent amount under the forefoot, so this is not a minimal shoe by any means.

Design and Key Features

The headline feature is the VFoam PEBAX midsole, which runs the full length of the shoe with almost two layers: one along the shoe and another at the back. Under the heel sits a donut design that Decathlon says is intended to maximize energy return.

Kiprun’s version of PEBAX is not the softest or springiest around. It has a fairly firm feel, but it returns a lot of energy, stays reasonably comfortable, and is designed to be very durable. Decathlon claims the shoe will last 1,000 km of running.

The outsole offers really good coverage, with only tiny cut sections of exposed foam and a gap in the donut. The rubber is inspired by a tire tread and gripped very well across a range of conditions. The upper is lightweight and not the most flexible or soft, but reasonably comfortable, with padding around the heel and tongue to limit lace bite while keeping weight down.

Fit and Sizing

The fit has been very good in normal running shoe size. A UK 9 here equates to a US 10 or an EU 43.5. The toe box is fairly roomy, with a good amount of room up front and a secure hold around the heel and midfoot.

The heel is well designed, with no heel rub or movement even without locking down the laces. Midfoot hold stays secure even for fast running and tight corners, with no slippage.

Ride Feel and Performance

After 66 km of testing across easy runs, daily training, a 22K long run, one hard interval session with 1K and 200 m reps, and a tempo 10K around 36 minutes, the shoe impressed on nearly every kind of run.

The concern going in was that the foam would feel firm and unimpressive, especially after the KD900X carbon shoe, which was quite firm. In practice, the KD 900 feels a fair bit softer without the plate, which makes a real difference on long and hard runs. There was no forefoot discomfort on either the 22K or the tempo 10K, even with a heel-snapping stride.

The heel feels noticeably softer and bouncier thanks to the donut, which is a real pleasure for heel strikers. The forefoot is a little more dull and flatter, without the big sinking, explosive bounce you get from something like the Adidas Boston 12 and its Lightstrike Pro. It is not exceptionally bouncy, but there is decent energy return, and the donut tips you forward quickly before rolling through well.

It is quick. The tempo 10K at around 3:36 per km felt genuinely comfortable, and 1K pickups at sub 3:20 pace on a long run felt good too. It is very light, so despite being a fairly big shoe, turnover feels quick. It works well as an uncomplicated speed shoe and held up against recent super trainers on a sustained fast run.

Grip and Outsole Performance

The outsole is excellent. On slick park paths after heavy rain, there were no concerns with grip at all. Standing on a wet pavement and moving your foot around, you can really feel the rubber bite.

That is something even far bigger running brands struggle with. The smooth, flat design is not built for trails, but on wet pavement it is superb, making this a strong winter option.

Verdict

This is a really accomplished, well-put-together shoe. It is not the most exciting all-rounder next to the Endorphin Speed 3 or 4, the Puma Deviate Nitro 2, the Boston 12, or the Superblast, all of which still feel better for the same jobs, but the KD 900 does those runs well and does not feel like a sacrifice.

Value and Buying Advice

At around £100, this is a tricky price point. It is not outstanding value in the way a £60 shoe would be, and plenty of good daily trainers compete nearby, such as the Puma Velocity Nitro 2 or the cheaper Reebok Floatride Energy 5, which are more cushioned if not as light or aggressive. The bigger issue is that excellent super trainers like the Adidas Boston 12 frequently dip toward this price in sales, and Decathlon does not tend to discount the KD 900 heavily itself.

Even so, it is definitely worth the money: good performance, good materials, a great outsole, and a comfortable fit. The main caveat is firmness. If you dislike a firmer ride, this feels firmer than many super trainers. For everyone else, it is comfortable up to and beyond half marathon distance, though a full marathon might start to test the forefoot.

Conclusion

The Kiprun KD 900 ticks nearly every box: it handles easy runs, long runs, tempo work, and fast reps, with excellent grip and a genuinely enjoyable heel donut for heel strikers. It may not beat the established all-rounders outright, but at £99.99 it is very good value and easy to recommend if you like a slightly firmer, fast-leaning ride.