For Sale UK

21 speed mountain bike

4

21 speed mountain bike for sale on largest auction and classifieds sites

Home / Bicycles / 21 speed mountain bike refurbished & used for sale | For Sale UK
Aili mountain bike - mountain,

Aili mountain bike - mountain,

£159.00
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Mountain bike 21 speed - 26'',

Mountain bike 21 speed - 26'',

£157.99
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Inch mountain bike - 24,

Inch mountain bike - 24,

£189.90
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Brand new gemarn - brand, road

Brand new gemarn - brand, road

£132.58
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Mongoose switchback sport 26in - mongoose,

Mongoose switchback sport 26in - mongoose,

£73.50
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Blue specialised hardtail

Blue specialised hardtail

£156.70
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Muddyfox typhoon 26in 15in - muddyfox,

Muddyfox typhoon 26in 15in - muddyfox,

£50.00
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Trek mountain bike 26in - bike,

Trek mountain bike 26in - bike,

£156.70
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26in mountain bike - 26in,

26in mountain bike - 26in,

£172.30
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Ladies mountain bike

Ladies mountain bike

£156.70
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Mountain bike 21 speed - 26'',

Mountain bike 21 speed - 26'',

£159.99
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Rockrider 26in mountain - mountain, bike

Rockrider 26in mountain - mountain, bike

£104.70
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Shimano deore mountain - xt, bike

Shimano deore mountain - xt, bike

£404.50
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Shimano folding mountain - shimano,

Shimano folding mountain - shimano,

£179.90
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Mountain bike inch wheel - mountain,

Mountain bike inch wheel - mountain,

£219.90
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Speed mountain bike - bike, 26''

Speed mountain bike - bike, 26''

£160.99
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Speed city hybrid - city,

Speed city hybrid - city,

£254.00
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Mongoose c303 26in - mongoose,

Mongoose c303 26in - mongoose,

£22.54
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Univega alpina 502 - 26in, 50cm

Univega alpina 502 - 26in, 50cm

£83.90
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Huffy korros inch speed - huffy, 24-inch

Huffy korros inch speed - huffy, 24-inch

£224.99
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Rockrider 500 mountain bike - 500,

Rockrider 500 mountain bike - 500,

£187.90
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British eagle reflex 26in - eagle,

British eagle reflex 26in - eagle,

£21.50
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Harrow wahdo 26in - wahdo,

Harrow wahdo 26in - wahdo,

£47.50
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Carrera 26in hardtail - 26in, m

Carrera 26in hardtail - 26in, m

£180.62
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Mongoose pro mountain - pro, bike

Mongoose pro mountain - pro, bike

£156.70
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Marley mountain bike 26in - bike,

Marley mountain bike 26in - bike,

£567.70
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Shimano folding mountain bike - shimano,

Shimano folding mountain bike - shimano,

£179.90
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Adult mountain bike front - mountain,

Adult mountain bike front - mountain,

£209.90
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Wheels mountain bike 21 - 27.5",

Wheels mountain bike 21 - 27.5",

£209.99
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5 29inch mountain - 24/26/27.5/29inch,

5 29inch mountain - 24/26/27.5/29inch,

£199.90
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Pink inch mountain bike 21 - inch,

Pink inch mountain bike 21 - inch,

£199.99
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Wheel mountain bike fat - mountain,

Wheel mountain bike fat - mountain,

£259.90
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Labomba large dirt jump - gt,

Labomba large dirt jump - gt,

£715.60
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Timberline mountain bike - timberline, 26

Timberline mountain bike - timberline, 26

£373.90
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Challenge ffs mountain bike - challenge,

Challenge ffs mountain bike - challenge,

£131.74
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Inch mountain bike adult - 24-29,

Inch mountain bike adult - 24-29,

£209.90
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Evercross mountain bike for - mountain,

Evercross mountain bike for - mountain,

£250.00
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2020 giant terrago - 2020,

2020 giant terrago - 2020,

£465.70
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Shimano folding mountain bike - folding,

Shimano folding mountain bike - folding,

£209.90
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29in electric bike 48v 6ah - bike, 18.6ah

29in electric bike 48v 6ah - bike, 18.6ah

£649.00
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Girls black carrera mountain - girls,

Girls black carrera mountain - girls,

£208.70
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Speed mountain bike - 21, cycle

Speed mountain bike - 21, cycle

£6.79
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5inch folding mountain bike - 27.5inch,

5inch folding mountain bike - 27.5inch,

£209.90
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Mountain bike 27 5 21 - bike, 26"

Mountain bike 27 5 21 - bike, 26"

£249.99
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Inch mountain bike - 21, speed

Inch mountain bike - 21, speed

£199.99
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Commencal meta 2006 - commencal,

Commencal meta 2006 - commencal,

£353.50
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Canyon torque slopeduro - canyon, dirt

Canyon torque slopeduro - canyon, dirt

£750.70
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Inch mountain bike adult - mountain,

Inch mountain bike adult - mountain,

£219.90
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Giant revel mountain - revel, bike

Giant revel mountain - revel, bike

£73.50
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5 29inch mountain - 24/26/27.5/29inch,

5 29inch mountain - 24/26/27.5/29inch,

£209.90
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Carrera mountain bike - bike, 29in

Carrera mountain bike - bike, 29in

£146.30
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Inch mountain hybrid - 26,

Inch mountain hybrid - 26,

£244.99
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Apollo interzone junior - interzone,

Apollo interzone junior - interzone,

£138.59
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Wheel folding mountain - 24'',

Wheel folding mountain - 24'',

£189.90
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Mountain bike licorne guide - bike,

Mountain bike licorne guide - bike,

£259.19
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Retro vintage 1997 frost - retro, 16"

Retro vintage 1997 frost - retro, 16"

£1281.70
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Ammaco disrupt 29in mountain - disrupt,

Ammaco disrupt 29in mountain - disrupt,

£104.70
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Mountain bike 21 - 27.5'',

Mountain bike 21 - 27.5'',

£219.90
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Probike escape 26in black - 26in,

Probike escape 26in black - 26in,

£78.70
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Adult mountain bike - 24'',

Adult mountain bike - 24'',

£189.99
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Carrera valour 6061 men - t6, men's

Carrera valour 6061 men - t6, men's

£26.70
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Folding mountain bike - folding,

Folding mountain bike - folding,

£298.99
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5inch mountain bike - mountain,

5inch mountain bike - mountain,

£199.90
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Shimano mountain bike 5in - bike, 27.5in

Shimano mountain bike 5in - bike, 27.5in

£125.50
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Giant mountain bike 26in - giant, m

Giant mountain bike 26in - giant, m

£516.70
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Huffy full suspension - in,

Huffy full suspension - in,

£200.00
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Pink 26inch mountain bike - pink,

Pink 26inch mountain bike - pink,

£189.90
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Basis connect mountain - basis,

Basis connect mountain - basis,

£211.99
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29in full suspension - 24-29in,

29in full suspension - 24-29in,

£219.90
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Folding mountain bike - 27.5"folding,

Folding mountain bike - 27.5"folding,

£229.99
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Mountain bike speed dual - bike, 21-speed

Mountain bike speed dual - bike, 21-speed

£74.00
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5inch mountain bike 21 - mountain,

5inch mountain bike 21 - mountain,

£219.90
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Speed mountain bike - 24,

Speed mountain bike - 24,

£6.79
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Inch mountain bike 21 - 27.5,

Inch mountain bike 21 - 27.5,

£209.99
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Inch wheel full - wheel,

Inch wheel full - wheel,

£199.90
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Mountain bike 21 - 26“, speed

Mountain bike 21 - 26“, speed

£219.90
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5 inch folding - inch,

5 inch folding - inch,

£209.90
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Umail unisex mountain bike - mountain,

Umail unisex mountain bike - mountain,

£209.90
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5 inch full - 24,

5 inch full - 24,

£189.90
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Huffy korros inch speed - huffy, 26-inch

Huffy korros inch speed - huffy, 26-inch

£242.99
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Cross womens mountain - womens, bike

Cross womens mountain - womens, bike

£191.99
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Folding mountain bike 5 - folding, 27.5

Folding mountain bike 5 - folding, 27.5

£219.99
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Inch mountain bike - fat, tire

Inch mountain bike - fat, tire

£259.90
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New inch mountain - new, bike

New inch mountain - new, bike

£209.99
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Boss venom wheel mountain - venom,

Boss venom wheel mountain - venom,

£229.99
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5inch folding mountain - folding,

5inch folding mountain - folding,

£189.90
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Mountain bike 22 - mountain, 18"

Mountain bike 22 - mountain, 18"

£156.69
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Full suspension mountain bike - mountain,

Full suspension mountain bike - mountain,

£229.99
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Inch adult mountain bike - 26,

Inch adult mountain bike - 26,

£209.90
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Inch adult mountain bike - inch,

Inch adult mountain bike - inch,

£219.90
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Mountain bike 21 speed - mountain,

Mountain bike 21 speed - mountain,

£269.99
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Claud butler cape - claud, wrath

Claud butler cape - claud, wrath

£104.70
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26inch mountain bike - mountain,

26inch mountain bike - mountain,

£199.90
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Inch wheel adult - 29,

Inch wheel adult - 29,

£219.90
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Mountain bike inch wheel - inch,

Mountain bike inch wheel - inch,

£219.99
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Bike 29in electric - bike, 48v

Bike 29in electric - bike, 48v

£649.00
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📊96 listings · from £6.79 · avg £226.76

Browse 96 21 speed mountain bike listings currently in our index. Prices range from £6.79 to £1281.7, with an average of £226.76. 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 21 speed mountain bike →

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Everything you need to know about 21 speed mountain bike

Whether you are looking for a brand-new or second-hand 21 speed mountain bike, eBay offers one of the largest selections available online. With 96 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 £6.79, while premium listings can reach £1281.7 — giving you a wide budget spread to work with. The average price of £226.76 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.

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