Boys 20 mountain bike
Boys 20 mountain bike for sale on Ireland's largest auction and classifieds sites
Kids mountain bike boys - mountain, 20” - £119.99
Bike type kids • Durable safe adventure • Ready gender boys - Free postage - New and Used
Bike type kids • Durable safe adventure • Ready gender boys - Free postage - New and Used
Kids mountain bike 6 - mountain, - £159.99
Kids mountain bike • Disc brakes • Suspension all terrain - Free postage - New and Used
Kids mountain bike • Disc brakes • Suspension all terrain - Free postage - New and Used
20inch kids bike boys - kids, - £129.99
Veloxbike youth kids • Bike lightweight durable • Adventure ready whether - Free postage - New and Used
Veloxbike youth kids • Bike lightweight durable • Adventure ready whether - Free postage - New and Used
New inch kids bike - 20, - £139.90
Wheels brakes gears • Must set fine • Tuned way they - Free postage - New and Used
Wheels brakes gears • Must set fine • Tuned way they - Free postage - New and Used
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Falcon samurai inch boys - falcon, 20" - £185.99
Most suitable children • Aged years well • Being great looking - Free postage - New and Used
Most suitable children • Aged years well • Being great looking - Free postage - New and Used
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48 listings · from £29.99 · avg £134.81
⚠️ These listings were last updated more than 17 days ago.
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Browse 48 boys 20 mountain bike listings currently in our index. Prices range from £29.99 to £199.99, with an average of £134.81. 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 boys 20 mountain bike →
Inch mountain bike speed - 20, - £109.98
Rim material mudguards • Both front rear • Wheels are equipped - Free postage - New and Used
Rim material mudguards • Both front rear • Wheels are equipped - Free postage - New and Used
Inch kids bike - 24, - £149.90
This stylish sturdy • Kids bike perfect • Gift your child - Free postage - New and Used
This stylish sturdy • Kids bike perfect • Gift your child - Free postage - New and Used
Inch mountain bike - mountain, - £96.49
- Free postage - New and Used
- Free postage - New and Used
Inch kids bike - 20, - £162.90
This stylish sturdy • Kids bike perfect • Gift your child - Free postage - New and Used
This stylish sturdy • Kids bike perfect • Gift your child - Free postage - New and Used
New inch kids bike boys - inch, - £162.90
This bike also • Gives you adjustable • Can customise suit - Free postage - New and Used
This bike also • Gives you adjustable • Can customise suit - Free postage - New and Used
Professional dude kids boys - professional, - £179.99
Dude kids bike • Your child • Made specifically young - Free postage - New and Used
Dude kids bike • Your child • Made specifically young - Free postage - New and Used
20inch kids bike - kids, girls - £131.99
Sporty design modern • Matte finish stylish • Decals gives premium - Free postage - New and Used
Sporty design modern • Matte finish stylish • Decals gives premium - Free postage - New and Used
Barracuda charge wheel - barracuda, 20" - £199.99
Fierce bold design • This bike will • Have your child - Free postage - New and Used
Fierce bold design • This bike will • Have your child - Free postage - New and Used
Boom 22inch kids bike - 18-22inch, - £145.90
Bicycle provide years • Fun equipped height • Adjustable saddle decorated - Free postage - New and Used
Bicycle provide years • Fun equipped height • Adjustable saddle decorated - Free postage - New and Used
Inch kids bike - inch, - £149.90
This bike also • Gives you adjustable • Can customise suit - Free postage - New and Used
This bike also • Gives you adjustable • Can customise suit - Free postage - New and Used
Inch kids bike - inch, unisex - £145.90
Bicycle provide years • Fun equipped height • Adjustable saddle decorated - Free postage - New and Used
Bicycle provide years • Fun equipped height • Adjustable saddle decorated - Free postage - New and Used
20inch kids bike - kids, boys - £149.90
This kids bike • Perfect balance safety • Durability fun single - Free postage - New and Used
This kids bike • Perfect balance safety • Durability fun single - Free postage - New and Used
20inch kids bike boys - kids, girls - £132.00
Brakes front rear • Sporty design modern • Matte finish stylish - Free postage - New and Used
Brakes front rear • Sporty design modern • Matte finish stylish - Free postage - New and Used
New inch unisex mountain - 20, - £132.68
Specifications material carbon • Steel rubber sponge • Aluminum alloy color - Free postage - New and Used
Specifications material carbon • Steel rubber sponge • Aluminum alloy color - Free postage - New and Used
New inch unisex - new, - £132.68
Specifications material carbon • Steel rubber sponge • Aluminum alloy color - Free postage - New and Used
Specifications material carbon • Steel rubber sponge • Aluminum alloy color - Free postage - New and Used
Blaze red front suspension - blaze, 20 - £63.10
Cheap bike ideal • Leaving parked daily • Exercising alone blaze - Free postage - New and Used
Cheap bike ideal • Leaving parked daily • Exercising alone blaze - Free postage - New and Used
Inch mountain bike speed - bike, 7 - £118.99
Kids mountain bike • Speed adjustable seat • 187lb capacity all - Free postage - New and Used
Kids mountain bike • Speed adjustable seat • 187lb capacity all - Free postage - New and Used
Inch unisex mountain bike - 20, - £138.05
Specifications material carbon • Steel rubber sponge • Aluminum alloy color - Free postage - New and Used
Specifications material carbon • Steel rubber sponge • Aluminum alloy color - Free postage - New and Used
New inch unisex mountain - 20, - £131.35
Package included mountain • Kettle holder storage • Bag english installation - Free postage - New and Used
Package included mountain • Kettle holder storage • Bag english installation - Free postage - New and Used
Inch unisex mountain bike - 20, - £137.05
Specifications material carbon • Steel rubber sponge • Aluminum alloy color - Free postage - New and Used
Specifications material carbon • Steel rubber sponge • Aluminum alloy color - Free postage - New and Used
Inch unisex mountain bike - inch, - £99.64
Specifications material carbon • Steel rubber sponge • Aluminum alloy color - Free postage - New and Used
Specifications material carbon • Steel rubber sponge • Aluminum alloy color - Free postage - New and Used
Inch unisex mountain - 20, - £132.69
Key features cool • Appearance bold combination • Classic black dazzling - Free postage - New and Used
Key features cool • Appearance bold combination • Classic black dazzling - Free postage - New and Used
Muddy fox muddyfox havana - fox, - £29.99
Muddy fox muddyfox • Havana red unisex • Kids mountain bike - Free postage - New and Used
Muddy fox muddyfox • Havana red unisex • Kids mountain bike - Free postage - New and Used
Inch unisex mountain bike - 20", - £139.44
Package included mountain • Kettle holder storage • Bag english installation - Free postage - New and Used
Package included mountain • Kettle holder storage • Bag english installation - Free postage - New and Used
New 22inch kids - new, unisex - £144.90
Bicycle provide years • Fun equipped height • Adjustable saddle decorated - Free postage - New and Used
Bicycle provide years • Fun equipped height • Adjustable saddle decorated - Free postage - New and Used
Inch unisex mountain bike - unisex, - £139.44
Cool appearance bold • Combination classic black • Dazzling red brings - Free postage - New and Used
Cool appearance bold • Combination classic black • Dazzling red brings - Free postage - New and Used
Boys mountain bike - 20, inch - £89.10
This boys mountain • Bike brand spike • Has inch wheels - Free postage - New and Used
This boys mountain • Bike brand spike • Has inch wheels - Free postage - New and Used
Inch unisex mountain bike - unisex, - £119.99
Speed gears smooth • Gear shifting handle • Different terrains ease - Free postage - New and Used
Speed gears smooth • Gear shifting handle • Different terrains ease - Free postage - New and Used
New inch unisex mountain - new, - £139.44
Package included mountain • Kettle holder storage • Bag english installation - Free postage - New and Used
Package included mountain • Kettle holder storage • Bag english installation - Free postage - New and Used
Inch unisex mountain bike - inch, - £139.59
Specifications material carbon • Steel rubber sponge • Aluminum alloy color - Free postage - New and Used
Specifications material carbon • Steel rubber sponge • Aluminum alloy color - Free postage - New and Used
Inch unisex mountain bike - 20, - £139.44
Description cycling great • Exercise that can • Help your child - Free postage - New and Used
Description cycling great • Exercise that can • Help your child - Free postage - New and Used
Inch kids bike - 22, - £159.90
This bike also • Gives you adjustable • Can customise suit - Free postage - New and Used
This bike also • Gives you adjustable • Can customise suit - Free postage - New and Used
New inch unisex mountain - new, 20 - £132.68
Package included mountain • Kettle holder storage • Bag english installation - Free postage - New and Used
Package included mountain • Kettle holder storage • Bag english installation - Free postage - New and Used
Inch unisex mountain bike - inch, - £139.45
Promotion mode chain • Material auto aus • Kohlenstoffstahl color red - Free postage - New and Used
Promotion mode chain • Material auto aus • Kohlenstoffstahl color red - Free postage - New and Used
Kids mountain bike 7 speed - 20", - £186.99
Kids mountain bike • Speed gears boys • Girls age seat - Free postage - New and Used
Kids mountain bike • Speed gears boys • Girls age seat - Free postage - New and Used
Inch kids bike boys - 18-24, - £149.90
This stylish sturdy • Kids bike perfect • Gift your child - Free postage - New and Used
This stylish sturdy • Kids bike perfect • Gift your child - Free postage - New and Used
Inch mountain bike - mountain, 7 - £114.05
Gross weight 12.65kg • 27.88lbs maximum bearing • Capacity 85kg 187lbs - Free postage - New and Used
Gross weight 12.65kg • 27.88lbs maximum bearing • Capacity 85kg 187lbs - Free postage - New and Used
Unisex kids mountain bike - unisex, - £97.49
Gross weight 12.65kg • 27.88lbs wheel 51cm • 20in maximum bearing - Free postage - New and Used
Gross weight 12.65kg • 27.88lbs wheel 51cm • 20in maximum bearing - Free postage - New and Used
Apollo chaos boys kids - chaos, 20" - £68.30
Apollo ivory bike • Little ones ride • Alongside their parents - Free postage - New and Used
Apollo ivory bike • Little ones ride • Alongside their parents - Free postage - New and Used
Inch unisex mountain - mountain, bike - £139.44
Package included mountain • Kettle holder storage • Bag english installation - Free postage - New and Used
Package included mountain • Kettle holder storage • Bag english installation - Free postage - New and Used
Falcon jetstream inch - inch, boys - £181.99
Well being great • Looking jetstream has • Spec match double - Free postage - New and Used
Well being great • Looking jetstream has • Spec match double - Free postage - New and Used
Inch unisex mountain - 20, bike - £140.25
Promotion mode chain • Material auto aus • Kohlenstoffstahl color red - Free postage - New and Used
Promotion mode chain • Material auto aus • Kohlenstoffstahl color red - Free postage - New and Used
Inch unisex mountain bike - inch, - £139.44
Package included mountain • Kettle holder storage • Bag english installation - Free postage - New and Used
Package included mountain • Kettle holder storage • Bag english installation - Free postage - New and Used
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Everything you need to know about boys 20 mountain bike
Whether you are looking for a brand-new or second-hand boys 20 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 £29.99, while premium listings can reach £199.99 — giving you a wide budget spread to work with. The average price of £134.81 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.