Search "treadmill" on Amazon UK and the treadmill aisle barely shows up. We read the top twenty listings on 17 October 2026, titles and feature bullets: eighteen fold flat, none carries an established gym brand, and one — sitting in the treadmill top twenty at £20.99 — is a rubber mat four millimetres thick. The aisle has quietly become the walking-pad aisle, and the numbers printed on it have adjusted accordingly.
Seventeen of the twenty print a horsepower figure, from 2.0 to 3.5HP. Exactly one adds the word "peak". Here is the arithmetic the aisle omits: a UK socket delivers about 3 kilowatts, which is roughly four horsepower of electrical input before a single watt of loss — so a £120 pad claiming "3.5HP" continuous is claiming nearly the entire capacity of the wall. Treat the number as decoration. The same goes for warranties: four listings print a year-number next to reassuring words, but on inspection one is "3 years of R&D" and two are a factory that has existed "for 16 years". Exactly one listing in the twenty states an actual warranty.
The short answer
- The one that behaves like a treadmill: the £399.99 auto-incline folder — 16% motorised incline (one of only three listings that say the incline is automatic), 14km/h, 150kg stated, 110×42cm belt.
- Best under £100: the 15% incline walking pad at £99.49 — 159kg stated limit, the highest in the twenty.
- The only actual warranty: Cardirun (£109.76) — one year, in writing, plus the aisle's most honest sentence: "no subscription required".
- Fastest stated belt: Superun (£89.99) — 16km/h claimed at the second-lowest price on the page.
- The claims case study: "20% incline, 3.5HP, 14km/h" at £203.99 — the boldest number in three columns, no weight limit stated, no warranty stated.
Prices are the Amazon buy box on 17 October 2026 and will move. No lab, no belt was run on: every figure comes from the maker, the listing or a named source, read on the date shown.
Prices and specs last checked by Look Into on 17 October 2026 · next check 11 December 2026 · how we picked
What twenty listings state — and what they leave out
Titles and feature bullets, top twenty Amazon UK treadmill results, 17 October 2026:
- 18 of 20 fold, and none is an established gym brand. The full-size home treadmill has left the top of the search; what ranks now is the under-desk walking pad. If you want a running machine with a motor warranty and a named service network, this aisle no longer stocks it — and one of its top twenty "treadmills" is a £20.99 mat.
- 17 of 20 print horsepower; 1 says "peak". Claims run 2.0–3.5HP. A 13-amp UK socket supplies about 3kW ≈ 4 electrical horsepower, total, before motor losses — the ceiling the big numbers are pressed against. Readers of our jump starter audit will recognise the move: the unlabelled number is the peak number.
- 17 of 20 advertise incline; 3 state that it is motorised. The rest print a percentage — 6% to 20% — and leave how it is achieved to the photos. A percentage without the word "auto" usually has to be set by hand before you step on.
- 1 of 20 states a warranty (one year, Cardirun). Three more print year-numbers dressed as reassurance — "3 years of R&D", a factory "dedicated to fitness equipment for 16 years" (that one appears twice, on two near-identical listings of the same pad at £129.99 and £128.69). A year-number next to the word "quality" is not a warranty.
- The only "subscription" in the twenty is a denial. Eight listings sell an app; one, Cardirun, says "no subscription required". When "no subscription" becomes a selling point, the subscription tax has become the category's reputation. (Its sibling aisle is worse: our exercise bike audit found twelve app-connected bikes and one subscription mention — a 30-day trial.)
- Belt sizes, where stated, are 95–110cm long and 40–49cm wide. That is a walking surface. Per square metre of stated belt, the twenty run from about £230 to about £870 (the £399.99 auto-incline) — and a 40cm-wide belt at any price is not a sprinting machine.
- Electricity is pennies, not the cost. At the October 2026 cap unit rate (26.32p/kWh), even a pad drawing a full kilowatt costs about 13p per half-hour walk. The money in this category is in the machine and, increasingly, the app — not the plug.
How we chose
Desk research, not a running test. We ranked on stated weight rating, stated belt size, whether incline is stated as motorised, a warranty in writing, and honesty about the app. Horsepower figures were treated as decoration, for the socket-arithmetic reason above.
The six picks
1. The 16% auto-incline folder — the one that behaves like a treadmill
£399.99 on 17 Oct 2026 · 16% motorised incline · 14km/h stated · 150kg stated · 110×42cm belt
One of only three listings in the twenty that states its incline is automatic, with the largest stated belt and a weight rating in writing. If the aisle still contains a treadmill, it is this.
The catch: no warranty stated, and at roughly £870 per square metre of belt it is the most expensive surface on the page.
2. The 15% incline pad — best under £100
£99.49 on 17 Oct 2026 · 15% incline stated · 10km/h · 159kg stated · 95×40cm belt
The highest stated user weight in the twenty, a stated belt size, and about £260 per square metre of walking surface — near the cheapest on the page.
The catch: the listing does not say the incline is motorised, which in this aisle usually means it isn't; no warranty stated.
3. Cardirun — the only actual warranty
£109.76 on 17 Oct 2026 · 1-year warranty in writing · 10km/h · 145kg stated · "no subscription required"
The one listing in the twenty that states a warranty as a warranty, and the one that prices its app at the only honest number in home fitness: zero, forever, in writing.
The catch: one year is the floor, not a boast — it simply happens to be the only floor anyone on this page put in writing.
4. Superun — fastest stated belt
£89.99 on 17 Oct 2026 · 16km/h stated · 136kg stated · app-connected
The fastest claimed speed in the twenty at the second-lowest price. 16km/h is a genuine running pace — if the belt holds it.
The catch: no belt size stated, which matters more at 16km/h than anywhere else on this page; and its "3 years" bullet is three years of R&D, not a warranty.
5. Toputure 6-in-1 — the mid-range all-rounder
£249.99 on 17 Oct 2026 · 12km/h · 130kg stated · 100×40cm belt · retractable rail
A stated belt, a stated weight rating and a folding rail design, from the same brand whose exercise bike made our bike picks — consistent about printing the specs that matter.
The catch: app-connected with, as everywhere in this aisle, no word on what the app's paid tier costs; no warranty stated.
6. The 20% × 3.5HP pad — the claims case study
£203.99 on 17 Oct 2026 · "20% incline" claimed · "3.5HP" claimed · 14km/h · 107×40cm belt
The boldest incline number and the boldest horsepower number in the twenty, on one £203.99 pad. 3.5 continuous horsepower would want nearly everything a UK wall socket can give.
The catch: no user weight limit stated and no warranty stated. The numbers are the product.
Compare the picks
The live table pulls prices from Amazon's product feed, which can sit off the buy box you pay; the prices in the cards above are the buy box as read on 17 October 2026.
Prices in this table come live from Amazon and can change through the day. Prices quoted in the text were checked by Look Into on 17 October 2026, so the two can differ.
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Who should skip this aisle
- Runners. A 40cm belt at 16km/h is a balance exercise, not a training tool. A proper running treadmill — wider belt, named brand, motor warranty — lives outside this search's top twenty, at several times these prices.
- Anyone buying the incline. If the listing doesn't say "auto" or "motorised", assume you'll be lifting the deck onto riser feet yourself; only three of twenty say otherwise.
- Anyone with a corridor and a pair of shoes. Walking is the one exercise whose equipment is free; the pad's real product is walking while at a desk, in a flat, in January. Buy it for that or not at all.