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Carrera mountain bike - mountain, 26in
£29.82
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Inch kids bike - inch,
£139.90
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Inch kids bike - 24,
£169.90
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Carrera karkinos mountain - karkinos,
£167.10
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Carrera vengeance 29in - carrera,
£156.70
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Apollo revolution 26in girls - apollo,
£83.90
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Carrera axel ltd - carrera, edition
£78.70
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Carrera vulcan mountain bike - carrera,
£161.90
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Marin muirwoods 1992 vintage - muirwoods,
£135.90
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Voodoo zobop 26in mountain - voodoo,
£208.70
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Giant terrago disc 26in 18in - giant,
£260.70
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Trek marlin mountain bike - marlin,
£193.10
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Inch kids mountain bike - inch,
£155.90
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Boss astro dual suspension - suspension, 26"
£99.00
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Inch kids bike - 18-24,
£169.90
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Basis mountain bike - 1, full
£206.99
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Inch kids mountain bike - 18,
£95.29
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Cross mens mountain - mens,
£168.30
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Carrera vengeance mens - carrera, 16
£309.79
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Inch kids bike boys - kids,
£149.90
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New 24 kids - 18", 22"
£139.90
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New inch kids bike boys - bike,
£139.90
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Children kids mountain bike - children's,
£67.99
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Yoac mountain bike dual - mountain,
£169.99
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Mountain bike ecosmo wheel - bike, 26"
£199.99
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Orange alpine 160 - orange, full
£465.70
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Inch kids bike - 20, 24
£162.90
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Basis mountain bike - basis, full
£211.99
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Scott aim 29in - 29in, bike
£360.67
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Carrera sulcata mountain bike - sulcata,
£130.70
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Kids mountain bike - 18-24'',
£169.90
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Carrera blast 24in - carrera,
£104.70
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Apollo twilight speed - apollo, 18-speed
£129.89
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Mountain bike 21 speed - bike,
£162.99
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Basis full mountain - basis,
£206.99
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Basis bicycle full susp - bicycle,
£196.99
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Boom 22inch kids - boom,
£139.90
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Bike kids mountain - kids,
£78.70
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New 22inch kids bike unisex - new,
£155.90
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Mongoose allure 24in full - allure,
£83.90
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Inch kids bike unisex - bike,
£144.90
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Dallingride duke full - dallingride,
£206.99
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Apollo gridlok 24in - 24in, kids
£78.70
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Yoac mountain bike 18 dual - 84,,
£169.99
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Apollo phaze men speed - phaze, men's
£144.89
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Kona kilauea mountain bike - kona, 26
£465.70
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One inbred dn6 - dn6, steel
£94.30
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Calibre two mountain bike - 3,
£299.96
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Basis link full suspension - basis,
£185.99
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Universal gents atb - universal,
£104.70
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Boom 22inch kids bike - boom,
£149.90
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24inch kids bike - bike, girls
£169.90
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Vintage retro rockshox duke - vintage,
£49.00
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Basis toro mountain - basis,
£196.99
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Kona kikapu gold full - gold, 18"
£130.00
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Kona fire mountain 18inch - fire,
£104.70
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Basis toro mountain bike - basis,
£222.99
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Vertigo mountain bike 26in - bike,
£78.70
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Saracen rufftrax mountain bike - rufftrax,
£29.28
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Dallingridge viscount mountain - viscount,
£206.99
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Basis bolt bike mountain - bolt,
£180.99
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Carrera mountain bike 29in - bike,
£146.30
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Speed mountain bike - 21,
£175.99
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Scott spark 26in mountain bike - 26in,
£100.54
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Dallingridge pulsar mountain - dallingridge,
£201.99
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Men mountain bike - men's,
£63.10
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Vitus nucleus 2018 mountain - vitus,
£240.00
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Inch kids bike - 20,
£139.99
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Dallingridge pulsar mountain - pulsar,
£180.99
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Carrera vengeance 29in - carrera,
£156.70
Buy It Now
Sunrims cr18 mountain bike - mountain,
£80.00
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Carrera krakatoa flex - krakatoa,
£135.00
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Basis link full suspension - basis,
£201.99
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Black mountain kapel - black, 18"
£280.46
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Apollo radar speed full - radar, 18
£244.89
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Airborne mountain bike - 🚲,
£26.70
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Apollo jewel brake - jewel, speed
£179.89
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Raleigh outland retro - raleigh,
£104.70
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Apollo phaze speed brakes - apollo, v-brakes
£169.89
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Voodoo mambo mountain bike - voodoo,
£42.29
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Apollo spiral womens gears - womens,
£134.79
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Morris 26in mountain bike - 26in,
£18.29
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Yoac mountain bike - mountain,
£185.99
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Retro 1993 lotus - retro, 7005
£550.00
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2014 raleigh mtrax lahar - mtrax,
£52.70
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Inch kids bike unisex - kids,
£135.90
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Carrera vengeance mens - carrera,
£334.79
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Speed mountain bike - speed,
£169.99
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Dallingridge arrow mtb boys - arrow,
£185.99
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Twin rockrider front - b’twin,
£68.30
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Vitus nucleus youth - nucleus, 24
£281.50
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Apollo slant 26in - apollo,
£156.70
Buy It Now
Apollo jewel womens - womens, 14''
£89.89
Buy It Now
Scott aim 29in - aim, m
£360.67
Buy It Now
Professional black mountain - professional,
£59.98
Buy It Now
Looking for more 18 mountain bike?
Search eBay live — fresh results filtered for the best value, updated every hour.
Browse 95 18 mountain bike listings currently in our index. Prices range from £18.29 to £550, with an average of £165.19. 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 18 mountain bike →
Try this: 1980 mongoose bmx | 1980s bmx bikes | 1980s mongoose bmx | 20 mountain bikes | 20 trials bike | 2016 trek bikes | 21 speed mountain bike | 24 trials bike | 26 bmx bikes | 26 mtb frame
Whether you are looking for a brand-new or second-hand 18 mountain bike, eBay offers one of the largest selections available online. With 95 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 £18.29, while premium listings can reach £550 — giving you a wide budget spread to work with. The average price of £165.19 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.