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21 speed mountain bike

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

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Mountain bike 21 speed - bike,

Mountain bike 21 speed - bike,

£155.99
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5 29inch mountain - 24/26/27.5/29inch,

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

£219.90
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Speed mountain bike - speed,

Speed mountain bike - speed,

£159.99
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Inch mountain bike adult - bike,

Inch mountain bike adult - bike,

£179.90
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Speed city hybrid - hybrid, bike

Speed city hybrid - hybrid, bike

£254.00
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Folding mountain bike - 26,

Folding mountain bike - 26,

£147.99
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Inch mountain bike - inch, adult

Inch mountain bike - inch, adult

£199.90
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Unisex mountain bike speed - unisex, 21

Unisex mountain bike speed - unisex, 21

£209.99
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Mountain bike 27 5 - bike, 27.5"

Mountain bike 27 5 - bike, 27.5"

£199.99
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Inch mountain bike adult - mountain,

Inch mountain bike adult - mountain,

£179.90
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Wheels mountain bike 21 - mountain,

Wheels mountain bike 21 - mountain,

£189.99
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Tridalade power pro 26in - tridalade,

Tridalade power pro 26in - tridalade,

£83.90
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Mountain bike inch wheel - inch,

Mountain bike inch wheel - inch,

£219.90
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Shimano folding mountain - shimano,

Shimano folding mountain - shimano,

£189.90
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Inch full suspension - 26,

Inch full suspension - 26,

£163.12
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Inch adult bike - inch, speed

Inch adult bike - inch, speed

£209.90
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Speed mountain bike - speed,

Speed mountain bike - speed,

£6.79
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Inch mountain bike - 24, 21

Inch mountain bike - 24, 21

£199.90
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Mens mountain bike - bike, mountaineer

Mens mountain bike - bike, mountaineer

£163.10
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Folding mountain bike - mountain,

Folding mountain bike - mountain,

£179.99
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Mountain bike 21 speed - mountain, 21-speed

Mountain bike 21 speed - mountain, 21-speed

£229.99
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Inch mountain bike adult - mountain,

Inch mountain bike adult - mountain,

£179.90
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Brand new gemarn road - brand, gemarn®

Brand new gemarn road - brand, gemarn®

£187.00
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Full suspension mountain - full,

Full suspension mountain - full,

£229.99
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Mens mountain bike mountaineer - mens,

Mens mountain bike mountaineer - mens,

£163.10
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Folding mountain bike shard - shard, 26

Folding mountain bike shard - shard, 26

£198.99
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Adult mountain bike front - mountain,

Adult mountain bike front - mountain,

£209.90
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Speed folding mountain bike - mountain,

Speed folding mountain bike - mountain,

£140.70
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Rcb26 mountain bike - rcb26",

Rcb26 mountain bike - rcb26",

£182.70
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Mountain bike 21 - 26",

Mountain bike 21 - 26",

£189.90
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Inch mountain bike speed - mountain,

Inch mountain bike speed - mountain,

£209.99
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Black hard tail mountain - black,

Black hard tail mountain - black,

£156.59
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Inch folding mountain - 24/26,

Inch folding mountain - 24/26,

£189.99
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5 inch folding - 24/26/27.5,

5 inch folding - 24/26/27.5,

£209.90
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Folding mountain bike - in,

Folding mountain bike - in,

£145.99
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Inch full suspension - 26,

Inch full suspension - 26,

£159.99
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Shimano folding mountain - mountain, bike

Shimano folding mountain - mountain, bike

£209.90
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Folding mountain bike - folding,

Folding mountain bike - folding,

£219.99
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Unisex bike specialized - bike,,

Unisex bike specialized - bike,,

£180.62
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Pink 26inch mountain bike - pink,

Pink 26inch mountain bike - pink,

£209.90
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Folding mountain bike 21 - bike,

Folding mountain bike 21 - bike,

£229.99
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Folding mountain bike - 26,

Folding mountain bike - 26,

£159.99
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Folding bike 26 inch - bike, 21

Folding bike 26 inch - bike, 21

£174.88
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Arden ridge speed mens - 21,

Arden ridge speed mens - 21,

£189.99
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Folding mountain bike full - folding,

Folding mountain bike full - folding,

£163.11
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26in mountain bike speed - mountain, 21-speed

26in mountain bike speed - mountain, 21-speed

£150.99
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Mens mountain bike - bike, mountaineer

Mens mountain bike - bike, mountaineer

£104.24
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Mens mountain bike mountaineer - mountain,

Mens mountain bike mountaineer - mountain,

£163.10
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Speed mountain bike - 24,

Speed mountain bike - 24,

£6.79
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Inch mountain hybrid - inch, bike

Inch mountain hybrid - inch, bike

£205.00
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Speed folding mountain bike - mountain,

Speed folding mountain bike - mountain,

£144.11
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Cross womens mountain bike - womens,

Cross womens mountain bike - womens,

£191.99
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5inch mountain bike - 24/26/27.5inch,

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

£199.90
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Bicycle twist gear - bicycle,

Bicycle twist gear - bicycle,

£10.49
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Lauxjack inch mountain - inch,

Lauxjack inch mountain - inch,

£208.70
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Speed folding mountain bike - folding,

Speed folding mountain bike - folding,

£140.70
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Mens mountain bike mountaineer - mens,

Mens mountain bike mountaineer - mens,

£188.31
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Mens mountain bike mountaineer - mens,

Mens mountain bike mountaineer - mens,

£163.10
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Bike speed full - 21, suspension

Bike speed full - 21, suspension

£161.48
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Trek 3700 blue - trek, blue/black

Trek 3700 blue - trek, blue/black

£41.68
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Mountain bike 21 - 26'',

Mountain bike 21 - 26'',

£219.99
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Adults red mountain - mountain, bike

Adults red mountain - mountain, bike

£156.70
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26inch mountain bike - mountain, pink

26inch mountain bike - mountain, pink

£199.90
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Shimano 5 mountain - shimano, 24"-27.5"

Shimano 5 mountain - shimano, 24"-27.5"

£209.90
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Inch folding bike 21 - &, 26

Inch folding bike 21 - &, 26

£177.77
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Folding mountain bike - 26,

Folding mountain bike - 26,

£161.99
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Inch mountain bike front - bike,

Inch mountain bike front - bike,

£207.99
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Inch adult mountain bike - adult,

Inch adult mountain bike - adult,

£209.90
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Carrera valour 26in mountain - valour,

Carrera valour 26in mountain - valour,

£52.70
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5inch wheel mountain - mountain, bike

5inch wheel mountain - mountain, bike

£209.90
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26in speed folding mountain - 21-speed,

26in speed folding mountain - 21-speed,

£163.11
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5inch folding mountain - folding,

5inch folding mountain - folding,

£209.90
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Mountain folding bike - 24/26, in

Mountain folding bike - 24/26, in

£218.99
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Mountain bike - '',

Mountain bike - '',

£209.90
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Folding mountain bike - &, 26

Folding mountain bike - &, 26

£177.77
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Mens mountain bike - mountain,

Mens mountain bike - mountain,

£163.10
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Unisex mountain bike - mountain,

Unisex mountain bike - mountain,

£209.90
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Wheel arden peak unisex - 26",

Wheel arden peak unisex - 26",

£219.99
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Folding mountain bike 24 - 26",

Folding mountain bike 24 - 26",

£177.77
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Wheel folding mountain - folding,

Wheel folding mountain - folding,

£189.90
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Inch full suspension - inch,

Inch full suspension - inch,

£139.99
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Mountain folding bike - bike, &

Mountain folding bike - bike, &

£176.99
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Mountain bike size 21 - m/l,

Mountain bike size 21 - m/l,

£229.00
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Inch mountain bike speed - inch, 21

Inch mountain bike speed - inch, 21

£163.11
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Wheel mountain bike fat - mountain,

Wheel mountain bike fat - mountain,

£265.59
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Inch mountain bike - inch,

Inch mountain bike - inch,

£209.99
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Black 21speed full - 21speed, suspension

Black 21speed full - 21speed, suspension

£163.11
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5inch mountain bike 21 - 24-27.5inch,

5inch mountain bike 21 - 24-27.5inch,

£199.90
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Carrera vulcan mountain bike - carrera,

Carrera vulcan mountain bike - carrera,

£115.10
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5 29inch mountain - 24/26/27.5/29inch,

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

£195.90
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Inch wheel mountain - wheel,

Inch wheel mountain - wheel,

£259.99
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Bike twist gear shifters - twist,

Bike twist gear shifters - twist,

£8.49
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Spatial 24inch wheel mountain - 24inch,

Spatial 24inch wheel mountain - 24inch,

£299.00
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Saracen mantra mountain - saracen,

Saracen mantra mountain - saracen,

£260.00
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Flying 26in mountain bike - flying,

Flying 26in mountain bike - flying,

£106.78
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Trioblade 650b mountain bike - mountain,

Trioblade 650b mountain bike - mountain,

£165.00
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📊96 listings · from £6.79 · avg £177.32
⚠️ These listings were last updated more than 24 days ago. Search for fresh listings

Browse 96 21 speed mountain bike listings currently in our index. Prices range from £6.79 to £299, with an average of £177.32. 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 →

Try this: 215 15 tyres | 215 60r16 | 215 60r16 tyres | 215 70r15 | 22 alloys | 22 amg wheels | 22 carat gold bangles | 22 carat gold jewellery | 22 range rover wheels | 22 rims

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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 £299 — giving you a wide budget spread to work with. The average price of £177.32 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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