Decathlon mountain bike
Decathlon mountain bike for sale on Ireland's largest auction and classifieds sites
Vgc decathlon water - decathlon, - £35.00
Very good condition • Minor signs use • Waist label removed - Free postage - New and Used
Very good condition • Minor signs use • Waist label removed - Free postage - New and Used
Unisex inch mountain bike - unisex, 20-inch - £156.70
Unisex inch mountain • Bike kids speed • Versatile durable option - Free postage - New and Used
Unisex inch mountain • Bike kids speed • Versatile durable option - Free postage - New and Used
Children bike inch - children’s, - £167.09
Adjustable seat thumb • Shifter derailleur gears • Make easy customize - Free postage - New and Used
Adjustable seat thumb • Shifter derailleur gears • Make easy customize - Free postage - New and Used
Decathlon rockrider st100 - rockrider, - £120.30
Decathlon rockrider st100 • Mountain bike wheels • Are set inch - Free postage - New and Used
Decathlon rockrider st100 • Mountain bike wheels • Are set inch - Free postage - New and Used
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Vgc decathlon rockrider am - **vgc**, - £36.00
Excellent condition barely • Used please check • Measurements before purchasing - Free postage - New and Used
Excellent condition barely • Used please check • Measurements before purchasing - Free postage - New and Used
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48 listings · from £5.44 · avg £70.48
⚠️ These listings were last updated more than 17 days ago.
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Browse 48 decathlon mountain bike listings currently in our index. Prices range from £5.44 to £445.3, with an average of £70.48. Whether you are hunting for a bargain or looking for a top-spec model, the selection below covers all price points — new, used and refurbished. More about decathlon mountain bike →
Decathlon rockrider st100 - decathlon, - £198.30
Decathlon rockrider st100 • Mountain bike vintage • Modern twist made - Free postage - New and Used
Decathlon rockrider st100 • Mountain bike vintage • Modern twist made - Free postage - New and Used
Mens decathlon rockrider - mens, - £7.59
These mens decathlon • Rockrider mountain bike • Shorts 2xl are - Free postage - New and Used
These mens decathlon • Rockrider mountain bike • Shorts 2xl are - Free postage - New and Used
Decathlon mountain bike helmet - mountain, - £9.95
Easy adjustments secure • Fit offers maximum • Comfort while keeping - Free postage - New and Used
Easy adjustments secure • Fit offers maximum • Comfort while keeping - Free postage - New and Used
Decathlon rockrider cycle - decathlon, - £39.99
Bnwts bought but • Never used - Free postage - New and Used
Bnwts bought but • Never used - Free postage - New and Used
Decathlon mountain bike rigid - decathlon, - £14.95
Mudguard set • Damaged packaging item • New other condition - Free postage - New and Used
Mudguard set • Damaged packaging item • New other condition - Free postage - New and Used
Decathlon mountain bike helmet - mountain, - £14.95
Decathlon mountain bike • Helmet 500 black • Unisex adults large - Free postage - New and Used
Decathlon mountain bike • Helmet 500 black • Unisex adults large - Free postage - New and Used
Twin original 100 bike - b'twin, - £73.50
Twin original 100 • Bike decathlon stylish • Girls aged years - Free postage - New and Used
Twin original 100 • Bike decathlon stylish • Girls aged years - Free postage - New and Used
Decathlon rockrider 700 - decathlon, - £37.10
Decathlon rockrider 700 • Mountain bike shoes • 9.5 spd cleats - Free postage - New and Used
Decathlon rockrider 700 • Mountain bike shoes • 9.5 spd cleats - Free postage - New and Used
Decathlon btwin 340 - decathlon, mountain - £73.50
Few scratches here • There little bit • Rust gears aren - Free postage - New and Used
Few scratches here • There little bit • Rust gears aren - Free postage - New and Used
Decathlon rockrider st100 - decathlon, - £187.90
Sale decathlon rockrider • St100 mountain bike • Very good condition - Free postage - New and Used
Sale decathlon rockrider • St100 mountain bike • Very good condition - Free postage - New and Used
Rockrider 100 kids 24 - st, - £119.85
This mountain bike • Rockrider 100 kids • Durable versatile option - Free postage - New and Used
This mountain bike • Rockrider 100 kids • Durable versatile option - Free postage - New and Used
Decathlon mountain bike - decathlon, - £15.75
Hate waste love • Bargain year produces • Over 200 tons - Free postage - New and Used
Hate waste love • Bargain year produces • Over 200 tons - Free postage - New and Used
Mountain bike helmet - helmet, 55-59cm - £25.50
Mountain bike helmet • 59cm black decathlon • 500 - Free postage - New and Used
Mountain bike helmet • 59cm black decathlon • 500 - Free postage - New and Used
Rockrider - , 9.2 - £445.30
Rockrider 9.2 decathlon • High quality mountain • Bike trail riding - Free postage - New and Used
Rockrider 9.2 decathlon • High quality mountain • Bike trail riding - Free postage - New and Used
Decathlon rockrider mountain - rockrider, - £28.78
Decathlon rockrider mountain • Bike trainers dispatched • Safely securely within - Free postage - New and Used
Decathlon rockrider mountain • Bike trainers dispatched • Safely securely within - Free postage - New and Used
Decathlon mountain bike rigid - decathlon, - £14.95
Mudguard set • Decathlon mountain bike • Durable practical accessory - Free postage - New and Used
Mudguard set • Decathlon mountain bike • Durable practical accessory - Free postage - New and Used
Mountain bike hydration - mountain, - £21.02
Excellent condition perfect • Daily rides very • Comfortable - Free postage - New and Used
Excellent condition perfect • Daily rides very • Comfortable - Free postage - New and Used
Decathlon rockrider 500 - rockrider, - £6.99
Undershorts padding included • These are just • Outer shorts this - Free postage - New and Used
Undershorts padding included • These are just • Outer shorts this - Free postage - New and Used
Bike helmet genuine - bike, - £10.97
Genuine decathlon rock • Rider trek bike • Helmet medium sized - Free postage - New and Used
Genuine decathlon rock • Rider trek bike • Helmet medium sized - Free postage - New and Used
Decathlon bike - £177.50
Decathlon bike used • Few times only - Free postage - New and Used
Decathlon bike used • Few times only - Free postage - New and Used
Decathlon btwin padded cushion - btwin, - £5.45
Per pictures tag • Taken off been • Just sitting back - Free postage - New and Used
Per pictures tag • Taken off been • Just sitting back - Free postage - New and Used
Decathlon btwin riverside 500 - btwin, - £281.50
Decathlon riverside 500 • Bike blue additionally • Has bell front - Free postage - New and Used
Decathlon riverside 500 • Bike blue additionally • Has bell front - Free postage - New and Used
Vintage decathlon sport cycle - vintage, - £5.45
Decathlon sports cycle • Jersey label polo • Shirt style collar - Free postage - New and Used
Decathlon sports cycle • Jersey label polo • Shirt style collar - Free postage - New and Used
Domyos exercise bike 500 - 500, | - £57.90
Domyos exercise bike • 500 decathlon good • Condition perfect working - Free postage - New and Used
Domyos exercise bike • 500 decathlon good • Condition perfect working - Free postage - New and Used
Rockrider decathlon 100 - rockrider, st - £5.44
Rockrider decathlon 100 • Adult mountain bike • Cycling gloves black - Free postage - New and Used
Rockrider decathlon 100 • Adult mountain bike • Cycling gloves black - Free postage - New and Used
Decathlon rockhoper mountain - decathlon, - £9.19
Elevate your cycling • Experience decathlon rockhoper • Mountain bike jersey - Free postage - New and Used
Elevate your cycling • Experience decathlon rockhoper • Mountain bike jersey - Free postage - New and Used
Decathlon rockrider mountain - rockrider, - £31.04
- Free postage - New and Used
- Free postage - New and Used
Decathlon helmet btwin size - helmet, - £10.00
Sale genuine decathlon • Helmet black color • Excellent condition was - Free postage - New and Used
Sale genuine decathlon • Helmet black color • Excellent condition was - Free postage - New and Used
Sets universal decathlon - 2, - £6.99
Product set universal • Decathlon brake pads • Are made black - Free postage - New and Used
Product set universal • Decathlon brake pads • Are made black - Free postage - New and Used
Decathlon 25l folding bike - 25l, - £12.94
Decathlon 25l folding • Bike front bag • Specifically cycling enthusiasts - Free postage - New and Used
Decathlon 25l folding • Bike front bag • Specifically cycling enthusiasts - Free postage - New and Used
Decathlondecathlon 500 - decathlondecathlon, - £21.50
This large waterproof • Bag withstand any • Weather conditions ensuring - Free postage - New and Used
This large waterproof • Bag withstand any • Weather conditions ensuring - Free postage - New and Used
Decathlon bike computer - decathlon, - £14.99
This bike computer • 500 black new • High quality cycling - Free postage - New and Used
This bike computer • 500 black new • High quality cycling - Free postage - New and Used
Twin spd flat touring - b'twin, spd/flat - £24.75
Deacthlon touring pedals • Flat one side • Spd shimano other - Free postage - New and Used
Deacthlon touring pedals • Flat one side • Spd shimano other - Free postage - New and Used
Decathlon jersey mens - decathlon, medium - £17.88
Pit length there • Pilling scuff left • Shoulder staining bottom - Free postage - New and Used
Pit length there • Pilling scuff left • Shoulder staining bottom - Free postage - New and Used
Vintage decathlon mountain - vintage, - £18.85
Vintage decathlon mountain • Self adhesive base • Bikes frame protection - Free postage - New and Used
Vintage decathlon mountain • Self adhesive base • Bikes frame protection - Free postage - New and Used
Decathlon mountain bike frame - mountain, - £75.38
Decathlon french company • That started making • Bicycles 1980s they - Free postage - New and Used
Decathlon french company • That started making • Bicycles 1980s they - Free postage - New and Used
Decathlon rockrider 3 - rockrider, 9.3 - £295.56
Uses rear shock • That 165 from • Eye - Free postage - New and Used
Uses rear shock • That 165 from • Eye - Free postage - New and Used
Cycling rockrider race - cycling, - £47.50
These rockrider race • 700 mountain bike • Shoes are trainers - Free postage - New and Used
These rockrider race • 700 mountain bike • Shoes are trainers - Free postage - New and Used
Decathlon triban 500 road - rc, - £10.06
Used bike seat • Dispatched asap - Free postage - New and Used
Used bike seat • Dispatched asap - Free postage - New and Used
Decathlon tight bike 500 - decathlon, - £18.82
Padding polyurethane polyester • Polyamide elastane fleecy • Interior protects against - Free postage - New and Used
Padding polyurethane polyester • Polyamide elastane fleecy • Interior protects against - Free postage - New and Used
skiing/snowboarding/Mountainbi - £31.90
Decathlon back protection • Skiing snowboarding mountain • Biking providing added - Free postage - New and Used
Decathlon back protection • Skiing snowboarding mountain • Biking providing added - Free postage - New and Used
Btwin riverside 500 - btwin, decathlon - £260.70
Btwin riverside 500 • Decathlon hybrid bike • Perfect leisurely ride - Free postage - New and Used
Btwin riverside 500 • Decathlon hybrid bike • Perfect leisurely ride - Free postage - New and Used
Decathlon rockrider 500 - decathlon, - £79.80
Pre owned very • Good condition clean • Well maintained smoke - Free postage - New and Used
Pre owned very • Good condition clean • Well maintained smoke - Free postage - New and Used
Try this: mudguards | ridgeback mx24 | transition bike | mt60 | cycle truing stand | specialized stumpjumper carbon | disabled bike | police bike | aluminium folding bike | teman bike
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Everything you need to know about decathlon mountain bike
Whether you are looking for a brand-new or second-hand decathlon mountain bike, eBay offers one of the largest selections available online. With 48 active listings at the time of this page's last update, you have plenty of choice across different conditions, sellers and price points. The cheapest option currently starts at £5.44, while premium listings can reach £445.3 — giving you a wide budget spread to work with. The average price of £70.48 can serve as a useful benchmark: listings below this tend to be used or auction-style, while those above often include extra accessories, warranties, or are sold by professional sellers with high feedback scores. Always check the seller's feedback rating and return policy before committing to a purchase. If you need the item quickly, filter by "Buy It Now" to avoid the uncertainty of auctions. For used items, look closely at the condition description and photos — terms like "good", "very good" and "like new" can mean very different things depending on the seller.