18 mountain bike
18 mountain bike for sale on Ireland's largest auction and classifieds sites
Inch kids bike - 18, 22 - £139.90
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
One inbred mountain bike - inbred, - £208.70
Amazing condition one • Inbred rare full • Top tube cable - Free postage - New and Used
Amazing condition one • Inbred rare full • Top tube cable - Free postage - New and Used
Boss astro dual - dual, suspension - £79.99
Boss astro full • Suspension mountain bike • Features multi link - Free postage - New and Used
Boss astro full • Suspension mountain bike • Features multi link - Free postage - New and Used
Basis bicycle full - basis, 2 - £169.99
Bicycle accesories basis • Componentry vibrant graphics • Gives unique look - Free postage - New and Used
Bicycle accesories basis • Componentry vibrant graphics • Gives unique look - Free postage - New and Used
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New inch kids - bike, girls - £169.90
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
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48 listings · from £57.9 · avg £182.63
⚠️ These listings were last updated more than 104 days ago.
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Browse 48 18 mountain bike listings currently in our index. Prices range from £57.9 to £797.2, with an average of £182.63. 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 →
Ecosmo alloy folding - ecosmo, - £159.99
Ecosmo wheel lightweight • Alloy folding mtb • Bicycle bike 17.5 - Free postage - New and Used
Ecosmo wheel lightweight • Alloy folding mtb • Bicycle bike 17.5 - Free postage - New and Used
New inch kids bike boys - kids, - £169.90
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
Arden velvet speed ladies - speed, - £189.99
Fine tune your • Adjustable handlebars seat • Height too colour - Free postage - New and Used
Fine tune your • Adjustable handlebars seat • Height too colour - Free postage - New and Used
Arden ridge speed mens - ridge, 21 - £189.99
Fine tune your • Adjustable handlebars seat • Height too colour - Free postage - New and Used
Fine tune your • Adjustable handlebars seat • Height too colour - Free postage - New and Used
Apollo jewel womens - womens, speed - £149.89
Forks apollo mtb • Jewel different mixing • Comfort durability quality - Free postage - New and Used
Forks apollo mtb • Jewel different mixing • Comfort durability quality - Free postage - New and Used
Inch kids bike - kids, boys - £165.90
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 24 kids - 18", 22" - £169.90
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
Boss venom womens speed - venom, - £179.89
Chainset 170mm crank • 42x34x24t chainrings get • Touch fork travel - Free postage - New and Used
Chainset 170mm crank • 42x34x24t chainrings get • Touch fork travel - Free postage - New and Used
Carrera kraken men mountain - kraken, - £78.70
Mountain bike • Carrera kraken men • Sleek sturdy aluminium - Free postage - New and Used
Mountain bike • Carrera kraken men • Sleek sturdy aluminium - Free postage - New and Used
Carrera vendetta mountain - vendetta, - £187.90
Collection only selling • Carrera vendetta mountain • Bike bought new - Free postage - New and Used
Collection only selling • Carrera vendetta mountain • Bike bought new - Free postage - New and Used
Sabre spd dual susp - spd, - £68.30
Mountain bike • Working used condition • Good tyres tubes - Free postage - New and Used
Mountain bike • Working used condition • Good tyres tubes - Free postage - New and Used
Huffy extent unisex speed - extent, 18-speed - £229.89
When you head • Outdoors grab bike • Want gender unisex - Free postage - New and Used
When you head • Outdoors grab bike • Want gender unisex - Free postage - New and Used
Basis mountain bike full - bike, - £211.99
Basis componentry vibrant • Graphics gives unique • Look furnished full - Free postage - New and Used
Basis componentry vibrant • Graphics gives unique • Look furnished full - Free postage - New and Used
Mountain bike ecosmo wheel - ecosmo, - £229.99
Ecosmo wheel folding • Steel mountain mtb • Bicycle bike 21sp - Free postage - New and Used
Ecosmo wheel folding • Steel mountain mtb • Bicycle bike 21sp - Free postage - New and Used
Apollo twilight womens - apollo, - £89.79
Forks apollo mtb • Primary colour grey • Pedals flat mountain - Free postage - New and Used
Forks apollo mtb • Primary colour grey • Pedals flat mountain - Free postage - New and Used
Inch kids bike - 18, 24 - £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
Apollo jewel womens - jewel, - £94.79
Forks apollo mtb • Pedals flat mountain • Handlebar type riser - Free postage - New and Used
Forks apollo mtb • Pedals flat mountain • Handlebar type riser - Free postage - New and Used
Inch kids bike - kids, boys - £154.90
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
Apollo slant mens gears - slant, 18 - £99.79
Forks apollo mtb • Mountain bike handlebars • 30mm rise degree - Free postage - New and Used
Forks apollo mtb • Mountain bike handlebars • 30mm rise degree - Free postage - New and Used
Apollo twilight womens - apollo, - £139.89
Mountain bike pedals • Forks apollo mtb • Primary colour grey - Free postage - New and Used
Mountain bike pedals • Forks apollo mtb • Primary colour grey - Free postage - New and Used
Huffy extent inch speed - extent, 24-inch - £230.00
Get ready open • Trails this 60cm • Huffy extent speed - Free postage - New and Used
Get ready open • Trails this 60cm • Huffy extent speed - Free postage - New and Used
Basis full mountain bike - 2, - £218.99
Basis componentry vibrant • Graphics gives unique • Look furnished full - Free postage - New and Used
Basis componentry vibrant • Graphics gives unique • Look furnished full - Free postage - New and Used
Dallingride duke full - ds, - £195.99
Combined suspension forks • Front duke certainly • Equipped unknown detour - Free postage - New and Used
Combined suspension forks • Front duke certainly • Equipped unknown detour - Free postage - New and Used
Inch kids bike girls - kids, - £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
Basis toro mountain - basis, bike - £211.99
Gearing taken care • Shimano tourney speed • System indexed using - Free postage - New and Used
Gearing taken care • Shimano tourney speed • System indexed using - Free postage - New and Used
Christmas present sleek - present?, - £156.70
Looks like new • Would make great • Christmas gift sleek - Free postage - New and Used
Looks like new • Would make great • Christmas gift sleek - Free postage - New and Used
New 22inch kids bike - new, - £135.90
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
Team avalanche retro - team, - £797.20
Relisted ebay would • Let add any • More photographs team - Free postage - New and Used
Relisted ebay would • Let add any • More photographs team - Free postage - New and Used
Wheel mountain bike - 26", - £120.00
This wheel mountain • Bike black red • Perfect adventurous boys - Free postage - New and Used
This wheel mountain • Bike black red • Perfect adventurous boys - Free postage - New and Used
Boss stealth mountain bike - boss, - £286.99
Stealth black componentry • Vibrant graphics gives • Cutting edge look - Free postage - New and Used
Stealth black componentry • Vibrant graphics gives • Cutting edge look - Free postage - New and Used
Ecosmo alloy folding - 26", - £209.99
Ecosmo wheel lightweight • Alloy folding mtb • Bicycle bike 17.5 - Free postage - New and Used
Ecosmo wheel lightweight • Alloy folding mtb • Bicycle bike 17.5 - Free postage - New and Used
Basis mountain bike - bike, full - £201.99
Basis componentry vibrant • Graphics gives unique • Look furnished full - Free postage - New and Used
Basis componentry vibrant • Graphics gives unique • Look furnished full - Free postage - New and Used
Cannondale 1994 m600 inch - 18, - £125.50
Good condition there • Cannondale 1994 m600 • Inch retro mountain - Free postage - New and Used
Good condition there • Cannondale 1994 m600 • Inch retro mountain - Free postage - New and Used
Specialized rockhopper expert - specialized, - £516.70
Specialized rockhopper expert • 1993 mountain bike • That has been - Free postage - New and Used
Specialized rockhopper expert • 1993 mountain bike • That has been - Free postage - New and Used
Carrera vengeance 5 inch - 27., - £156.70
Has new grips • Tires • Pedals - Free postage - New and Used
Has new grips • Tires • Pedals - Free postage - New and Used
Apollo jewel girls - jewel, mountain - £57.90
Apollo jewel girls • Mountain bike stylish • Speed bicycle women - Free postage - New and Used
Apollo jewel girls • Mountain bike stylish • Speed bicycle women - Free postage - New and Used
Diamondbacks sorrento retro - diamondbacks, - £125.02
Diamondbacks sorrento retro • Mtb would think • Match front rims - Free postage - New and Used
Diamondbacks sorrento retro • Mtb would think • Match front rims - Free postage - New and Used
Basis bolt mountain - bolt, - £180.99
Basis recruits latest • Junior mountain bike • Bolt simplistic yet - Free postage - New and Used
Basis recruits latest • Junior mountain bike • Bolt simplistic yet - Free postage - New and Used
New inch kids bike - new, - £169.90
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
Basis connect mountain - connect, - £190.99
Handlebars mtb style • Black bicycle accesories • Gearing shimano speed - Free postage - New and Used
Handlebars mtb style • Black bicycle accesories • Gearing shimano speed - Free postage - New and Used
Huffy extent unisex speed - huffy, 18-speed - £229.89
Padded saddle features • Alloy quick release • Seat clamp make - Free postage - New and Used
Padded saddle features • Alloy quick release • Seat clamp make - Free postage - New and Used
Trek 4000 classic - trek, mountain - £109.90
Trek 4000 series • Classic mountain bike • Circa 2001 rigid - Free postage - New and Used
Trek 4000 series • Classic mountain bike • Circa 2001 rigid - Free postage - New and Used
Carrera vulcan - vulcan, - £94.30
Carrera vulcan inch • Frame great condition • Bike sold seen - Free postage - New and Used
Carrera vulcan inch • Frame great condition • Bike sold seen - Free postage - New and Used
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Everything you need to know about 18 mountain bike
Whether you are looking for a brand-new or second-hand 18 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 £57.9, while premium listings can reach £797.2 — giving you a wide budget spread to work with. The average price of £182.63 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.