Mountain Bikes

Tackle trails, downhill challenges, and rugged terrain with Decathlon’s trail-ready mountain bikes. Our range includes options for adults and children, featuring premium models from Rockrider and Btwin. Pair your bike with our wide selection of mountain bike accessories for the ultimate off-road experience. Shop now and gear up for adventure.
138 items
ROCKRIDER 27.5" Mountain Bike - EXPL 50 Light Grey

ROCKRIDER 27.5" Mountain Bike - EXPL 50 Light Grey

(1)
3 colours
£249.99
Sale
ROCKRIDER 29" Touring Mountain Bike Expl 520 - Blue

ROCKRIDER 29" Touring Mountain Bike Expl 520 - Blue

(773)
£449.99
£549.99£100 off
Sale
ROCKRIDER 27.5"+ Electric Hardtail MTB Bike E-ST 900 - Grey

ROCKRIDER 27.5"+ Electric Hardtail MTB Bike E-ST 900 - Grey

(696)
£1,599.99
£1,999.99£400 off
Best value
ROCKRIDER 24" 9-12 Years Mountain Bike Expl 500 - Black

ROCKRIDER 24" 9-12 Years Mountain Bike Expl 500 - Black

(313)
2 colours
£249.99
Sale
ROCKRIDER 20" 6-9 Years Mountain Bike Expl 120 - White

ROCKRIDER 20" 6-9 Years Mountain Bike Expl 120 - White

(273)
£179.99
£189.99£10 off
Last chance
ROCKRIDER 29" Hardtail Electric Mountain Bike E-Expl 520 - Mango

ROCKRIDER 29" Hardtail Electric Mountain Bike E-Expl 520 - Mango

(187)
2 colours
£1,899.99
£1,999.99£100 off
Sale
ROCKRIDER 27.5" Hardtail Electric Mountain Bike E-ST 100 - White/Red

ROCKRIDER 27.5" Hardtail Electric Mountain Bike E-ST 100 - White/Red

(322)
£999.99
£1,099.99£100 off
Best value
ROCKRIDER Kids' 24" 9-12 Years Mountain Bike ST 900 - Red

ROCKRIDER Kids' 24" 9-12 Years Mountain Bike ST 900 - Red

(310)
£349.99
Sale
ROCKRIDER 29" Full Suspension Electric Mountain Bike E-EXPL 500 S - Metal Grey

ROCKRIDER 29" Full Suspension Electric Mountain Bike E-EXPL 500 S - Metal Grey

(156)
£2,099.99
£2,499.99£400 off
Sale
ROCKRIDER 29" Hardtail Electric Mountain Bike E-Expl 700 - Bottle Green

ROCKRIDER 29" Hardtail Electric Mountain Bike E-Expl 700 - Bottle Green

(258)
£2,299.00
£2,499.99£200.99 off
Sale
ROCKRIDER 29" Full Suspension Electric Mountain Bike E-Expl 520 S - Bright Red

ROCKRIDER 29" Full Suspension Electric Mountain Bike E-Expl 520 S - Bright Red

(235)
£2,699.00
£2,999.99£300.99 off
Sale
ROCKRIDER Kids' 20" 6-9 Years Mountain Bike Expl 500 - Black

ROCKRIDER Kids' 20" 6-9 Years Mountain Bike Expl 500 - Black

(650)
2 colours
£209.99
£219.99£10 off
Sale
ROCKRIDER 29 inch Touring Mountain Bike Explore 540 - Plum / Black

ROCKRIDER 29 inch Touring Mountain Bike Explore 540 - Plum / Black

£599.99
£749.99£150 off
Last chance
ROCKRIDER 29" Touring Mountain Bike Expl 500 - Black

ROCKRIDER 29" Touring Mountain Bike Expl 500 - Black

(873)
2 colours
£399.99
£449.99£50 off
Sale
ROCKRIDER Women's 27.5" Electric Mountain Bike E-ST 500

ROCKRIDER Women's 27.5" Electric Mountain Bike E-ST 500

(1)
£1,199.99
£1,599.99£400 off
Best value
ROCKRIDER 27.5" Touring Mountain Bike ST 120 - Black/Blue

ROCKRIDER 27.5" Touring Mountain Bike ST 120 - Black/Blue

(3599)
2 colours
£349.99
Sale
ROCKRIDER 29" Touring Mountain Bike Explore 540 - Blue/Black

ROCKRIDER 29" Touring Mountain Bike Explore 540 - Blue/Black

(3)
£599.99
£749.99£150 off
Sale
ROCKRIDER 27.5" Mountain Bike ST 900 S - Grey/Yellow

ROCKRIDER 27.5" Mountain Bike ST 900 S - Grey/Yellow

(283)
£699.99
£899.99£200 off
Sale
HUFFY Huffy Korros 27.5" Mountain Bike Hardtail Front Suspension Shimano 21 Spd MTB

HUFFY Huffy Korros 27.5" Mountain Bike Hardtail Front Suspension Shimano 21 Spd MTB

(1)
Sold and shipped by United Wheels UK Ltd
£275.08
£299.00£23.92 off
Sale
ROCKRIDER Women's 27.5" + Electric Semi-Rigid E-ST 900 MTB Bike - Turquoise

ROCKRIDER Women's 27.5" + Electric Semi-Rigid E-ST 900 MTB Bike - Turquoise

(256)
£1,199.99
£1,999.99£800 off
ROCKRIDER Women's 27.5" Mountain Bike ST 120 - Navy

ROCKRIDER Women's 27.5" Mountain Bike ST 120 - Navy

(581)
£349.99
ROCKRIDER 29" Touring Mountain Bike Expl 500 - Red

ROCKRIDER 29" Touring Mountain Bike Expl 500 - Red

(873)
2 colours
£449.99
Sale
ROCKRIDER MTB Cross Country Race 740 Carbon Frame - Blue

ROCKRIDER MTB Cross Country Race 740 Carbon Frame - Blue

(223)
2 colours
£1,499.99
£1,899.99£400 off
Sale
STILUS 29"/27.5" Full Suspension Electric Mountain Bike E-Big Mountain - Green

STILUS 29"/27.5" Full Suspension Electric Mountain Bike E-Big Mountain - Green

(29)
£4,299.99
£4,999.99£700 off
CLAUD BUTLER Claud Butler Wrath 2.0 Cues Electric Mountain Bike

CLAUD BUTLER Claud Butler Wrath 2.0 Cues Electric Mountain Bike

Sold and shipped by Tandem Group Trading
£1,899.99
£1,899.99/unit
Sale
NINER BIKES Niner WFO Enduro Bike Medium Carbon Frame Full Suspension

NINER BIKES Niner WFO Enduro Bike Medium Carbon Frame Full Suspension

Sold and shipped by United Wheels UK Ltd
From £3,449.00
£5,449.00£2,000 off
CLAUD BUTLER Claud Butler Wrath 1.0 Cues Electric Mountain Bike

CLAUD BUTLER Claud Butler Wrath 1.0 Cues Electric Mountain Bike

Sold and shipped by Tandem Group Trading
£1,649.99
£1,649.99/unit
BASIS Basis 1 Full Suspension Mountain Bike - 26in Wheel - 18 Speed Black Pink

BASIS Basis 1 Full Suspension Mountain Bike - 26in Wheel - 18 Speed Black Pink

(1)
Sold and shipped by E-Bikes Direct
£218.99
CLAUD BUTLER Claud Butler Wrath 1.0 Cues Electric Mountain Bike

CLAUD BUTLER Claud Butler Wrath 1.0 Cues Electric Mountain Bike

Sold and shipped by Tandem Group Trading
£1,649.99
£1,649.99/unit
BOSS Boss Phantom Mens Hardtail Mountain Bike 27.5in Wheel - Satin Blue

BOSS Boss Phantom Mens Hardtail Mountain Bike 27.5in Wheel - Satin Blue

Sold and shipped by E-Bikes Direct
£459.99
CLAUD BUTLER Claud Butler Ridge 1.0 Medium Electric Mountain Bike

CLAUD BUTLER Claud Butler Ridge 1.0 Medium Electric Mountain Bike

Sold and shipped by Tandem Group Trading
£1,399.99
£1,399.99/unit
Sale
NINER BIKES Niner RKT XC Bike Medium Carbon Frame Full Suspension 3* Black

NINER BIKES Niner RKT XC Bike Medium Carbon Frame Full Suspension 3* Black

Sold and shipped by United Wheels UK Ltd
£3,499.00
£5,699.00£2,200 off
Sale
NINER BIKES Niner RKT XC Bike Large Carbon Frame Full Suspension 2* Black

NINER BIKES Niner RKT XC Bike Large Carbon Frame Full Suspension 2* Black

Sold and shipped by United Wheels UK Ltd
£2,799.00
£4,399.00£1,600 off
BASIS Basis El Toro Men's Hardtail Mountain Bike, 27.5In Wheel, 17in Frame - Black/Red

BASIS Basis El Toro Men's Hardtail Mountain Bike, 27.5In Wheel, 17in Frame - Black/Red

(1)
Sold and shipped by E-Bikes Direct
£275.99
Sale
NINER BIKES Niner JET Trail Bike Large Carbon Frame Full Suspension 2* Grey

NINER BIKES Niner JET Trail Bike Large Carbon Frame Full Suspension 2* Grey

Sold and shipped by United Wheels UK Ltd
£3,099.00
£4,799.00£1,700 off
EASTERN BIKES Eastern Alpaka 29 MTB Hardtail Bike - Yellow

EASTERN BIKES Eastern Alpaka 29 MTB Hardtail Bike - Yellow

(3)
5 colours
Sold and shipped by Premium Cycle Brands
£599.99
EASTERN BIKES Eastern Alpaka 29 MTB Hardtail Bike - Black

EASTERN BIKES Eastern Alpaka 29 MTB Hardtail Bike - Black

(3)
5 colours
Sold and shipped by Premium Cycle Brands
£599.99
EASTERN BIKES Eastern Alpaka 29 MTB Hardtail Bike - Grey

EASTERN BIKES Eastern Alpaka 29 MTB Hardtail Bike - Grey

(3)
5 colours
Sold and shipped by Premium Cycle Brands
£599.99
EASTERN BIKES Eastern Alpaka 29 MTB Hardtail Bike - Blue

EASTERN BIKES Eastern Alpaka 29 MTB Hardtail Bike - Blue

(3)
5 colours
Sold and shipped by Premium Cycle Brands
£599.99
EASTERN BIKES Eastern Alpaka 29 MTB Hardtail Bike - Red

EASTERN BIKES Eastern Alpaka 29 MTB Hardtail Bike - Red

(3)
5 colours
Sold and shipped by Premium Cycle Brands
£599.99
4.2/5 based on 24263 reviews collected online and in stores

Mountain Bikes for Challenging Terrains

Engineered for rugged, off-road landscapes, a mountain bike is built for durability and impact. Perfect for tackling downhills, forest trails, single tracks and unpaved paths, our MTBs are equipped with premium tyres designed for grip and traction in tough conditions. Choose the best tyre type for your terrain and experience smoother, safer rides. Whether you’re looking for a versatile hardtail mountain bike or a speedy downhill model, our MTB bikes are designed to conquer any challenge.

Full Suspension Mountain Bikes & E-Mountain Bikes

Experience smoother rides with our full-suspension mountain bikes, ideal for rugged trails and uneven paths. Featuring brands like Barracuda, Freespirit, Basis and Lombardo, our range includes options for men, women, and kids— each model designed to meet the demands of rugged trails and ensure a comfortable ride. Need extra power on the trails? Our e-mountain bikes are a great choice for those seeking long rides with less fatigue.

Mountain Bike Accessories

Complete your setup with our selection of mountain bike accessories. From mountain bike helmets to mountain bike shorts, Decathlon has everything you need to get out on UK trails with confidence. If you prefer to concrete comfort of roads, see our collection of road bikes.