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The Big Trail 500 strikes the ideal balance between playful agility and rock-solid stability, making it your go-to hardtail for tackling rough and technical trails. Built around a lightweight aluminium frame and equipped with a RockShox Psylo Silver fork, it smooths out the bumps so you can focus on the ride. Shimano’s reliable CUES components deliver crisp, dependable shifting mile after mile.
The Big Trail 500 strikes the ideal balance between playful agility and rock-solid stability, making it your go-to hardtail for tackling rough and technical trails. Built around a lightweight aluminium frame and equipped with a RockShox Psylo Silver fork, it smooths out the bumps so you can focus on the ride. Shimano’s reliable CUES components deliver crisp, dependable shifting mile after mile.
Merida

Current Demo Bike - Merida Big Trail 500 - Hardtail 2025 in Grey XS

£1,499.00
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Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
Earn Rewards
When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

Hassle-free returns

It is important to everyone at Oneplanet Adventure that you are over the moon with your new purchase. However, if for any reason you aren’t, we do offer a 365-day returns policy. Items purchased from the Oneplanet Adventure website, with the exception of custom-built bikes, wheels or ex-demo / ex-rental bikes can be returned, provided the item has not been used or fitted and is in its original packaging with a valid proof of purchase.

The quickest way to return an item to us is to drop it into the store with the original receipts and packaging that came with the order here at Oneplanet Adventure, Coed Llandegla Forest, Ruthin Rd, Llandegla, LL11 3AA. But if you wish to return your purchase by post simply complete our returns form, which we send out with every order, and provide us with all the details of why you wish to return your purchase with again the original receipt or invoice and all the packaging that came with the order. Once you have completed the Returns Form send your package back to us at Oneplanet Adventure, Coed Llandegla Forest, Ruthin Rd, Llandegla, LL11 3AA.

If you've lost your returns form or wish to return an item under warranty, CLICK HERE to take you to where you can download the return form.

It is your responsibility to ensure that the item is returned to us in a safe and secure manner, we suggest that you use a recorded postal/courier service. Please ensure that the service you use covers the value of the goods in the parcel. Return shipping costs are non-refundable unless an item is found to be faulty, in which case any postage costs will be reimbursed following our assessment of the product. To ensure your return arrives safely at the centre, we recommend using Royal Mail as they are aware of what to do with our returns from customers.

It can take 5 days for your parcel to reach us depending on the postal service that is used. Once we receive your parcel we will aim to inspect and process your return within 24 hours. Refunds can take up to 5 days to appear in your account. Credit and debit card refunds must be made to the card used for the original purchase. You will receive an email update upon the completion for your return.

If you wish to exchange an item for any reason the quickest and simplest way to do this is to place a new order for the item you want and return the other item for a refund.

Cyclescheme / V12 Finance

If you have made a mail order purchase using our online finance option or through Cyclescheme and would like to return your purchase, please contact us on 01978 751656 or email us, hello@oneplanetadventure.com, before returning your item.

Faulty items and warranty claims

If you believe an item you have received from us is faulty please contact us by email or phone before returning the item.

All products purchased from Oneplanet Adventure come with a full warranty which covers manufacturing faults and defects in workmanship. If you feel that your purchase has developed a fault, please call or email us. If you email, it is really helpful to include photographs of your product and please also include your original order number.

Current Demo Bike - Merida Big Trail 500 - Hardtail 2025 in Grey XS

Season:MY25

Brand:Merida

Code:MY25-Merida-BigT-XS-DB

Discover Unbeatable Savings and Quality at Oneplanet Adventure

At Oneplanet Adventure, we offer a range of fantastic schemes designed to help you save on your next bike. We proudly accept CycleScheme, Green Commute Initiative, Vivup, Evans Cycles, and Halfords Cycle2Work. With access to thousands of participating companies and employees, the savings are huge, making it easier than ever to get the bike you want. Contact us today to find out more!

Premium Demo Fleet: Quality You Can Trust

Our Demo Fleet is a cornerstone of what we offer here at Oneplanet Adventure. We take exceptional care of each bike in our fleet, ensuring they’re always in top condition. We select only the best bikes, perfectly suited for UK trails and the needs of our customers. As these bikes don’t stay in the fleet for the entire season, you could end up with a demo bike that's been used for just a few months. Every bike is meticulously cleaned, maintained, and restored to showroom condition between demos, so when you buy, you’re getting a bike that feels almost new.

Free Invisiframe Kit with Every Demo or Hire

We go the extra mile to protect your investment. Every bike you demo or hire from Oneplanet Adventure comes fitted with an Invisiframe kit at no extra cost. This protective layer helps guard against stone chips, cable rub, and everyday wear and tear—keeping your bike looking fresh for longer. Plus, if any part of the Invisiframe gets damaged, we’ll replace it free of charge.

Exclusive Bike Sale Packages

When you purchase a bike from us, you’ll benefit from ourNEW Bike Sale Packages, including:

  • Customer Rewards Scheme
  • Free Trail Setup Session
  • 30% off any of our skills courses
  • Free full suspension bike hire for a friend or family member within 12 months
  • Free set of gear cables and OPA mudguard
  • 25% off your first in-house fork and shock service
  • Free 1st Service Health Check
  • Referral Reward when a friend or family buys a bike

Please Note:If a bike is listed as a "Current Demo Bike," it means it’s still being actively used for demos. Once we receive your order, the bike will be retired from demo duty and sent straight to our workshop for a thorough refurbishment. Any parts that show excessive wear will be replaced at no additional cost, ensuring the bike is fully ready to ride.

Official Demo Centre Warranty

As an Official Demo Centre, all our demo bikes come with a warranty starting from the date of purchase, giving you full confidence in your purchase.

Technical Information
FrameBIG.TRAIL TFS II; MAT aluminium; 29x2.5" max. maximum tyre clearance; 148x12 AST; BSA BBR
ForkRock Shox Psylo Silver RC; Air; 140mm travel; platform
HeadsetAcros ICR Merida external neck; Upper and lower IPS sealing
StemMerida Expert eTRII; aluminium; 35mm diameter; 0 degree rise - Size - 40 mm
BarsMerida Expert TR II; aluminium; 780mm wide; 18mm rise
Front BrakeShimano MT410; 4 piston with Shimano RT30; 203mm rotor
Rear BrakeShimano MT4100; 2 piston with Shimano RT30; 180mm rotor
Brake LeverShimano MT4100
Rear MechShimano CUES U6000; GS
ShiftersShimano CUES U6000
Speed10
RimsMerida Comp TR; 29mm inner rim width; aluminium; Tubeless ready (tubeless tape and valves not included)
Front HubShimano TC500-B; 110x15mm; 32 spoke; Centerlock
Rear HubShimano TC500-HM-B; 148x12mm; 32 spoke; Centerlock
SpokesDouble Butted Black stainless
Front TyreMaxxis Minion DHF; 29x2.5"; Kevlar bead; TR EXO Dual
Rear TyreMaxxis Dissector; 29x2.4"; Kevlar bead; TR EXO Dual
Seat PostMerida Expert TR II Dropper Post; 34.9mm diameter; 0 mm layback; XShort: 150 mm seat post travel - Short/Mid : 170 mm seat post travel - Long: 200 mm seat post travel - XLong: 230 mm seat post travel
SaddleMerida Comp SL; V-mount
ChainsetMerida Expert TR II; 32 teeth With Merida Expert TR ISCG05 - 165mm XSHORT and SHORT; 170mm MID, LONG und XLONG
ChainKMC xGlide
CassetteShimano LG300; 11-48 teeth; 10 speed
PedalsResin Platform
Sizing Information
Professional Opinion

Conquer the Trail with Confidence - Meet the Merida Big Trail 500

The Big Trail 500 strikes the ideal balance between playful agility and rock-solid stability, making it your go-to hardtail for tackling rough and technical trails. Built around a lightweight aluminium frame and equipped with a RockShox Psylo Silver fork, it smooths out the bumps so you can focus on the ride. Shimano’s reliable CUES components deliver crisp, dependable shifting mile after mile.

Key Highlights:

  • Lightweight aluminium frame with progressive geometry for confident handling on any trail

  • RockShox Psylo Silver RC air fork with 140mm travel to absorb rough terrain and big hits

  • Shimano CUES U6000 10-speed drivetrain for smooth, efficient gear changes and climbing power

  • Shimano MT410 hydraulic disc brakes with a 4-piston front and 2-piston rear setup for powerful, controlled braking

  • 29” tubeless-ready wheels matched with grippy Maxxis Minion DHF and Dissector tyres for enhanced traction

  • Merida Expert TR dropper post with adjustable travel to boost control on descents

Built for riders who crave adventure, the Big Trail 500 combines modern frame geometry with top-tier trail components. A slacker head angle and longer reach inspire confidence on steep, technical descents, while the steeper seat tube angle helps you stay efficient and centered on tough climbs. The 140mm RockShox fork delivers responsive suspension, soaking up chatter and hits to keep your ride smooth.

Big 29" wheels and Maxxis tyres provide impressive grip and roll-over ability, ensuring stability even on loose or rocky terrain. The Shimano CUES drivetrain offers a wide gear range to make climbs manageable and descents fast and fun, while the powerful Shimano brakes give you the control you need in all conditions.

Available in sizes from XSmall to XLarge, the Big Trail 500 is built to fit a wide range of riders. Whether you're exploring your local singletrack or pushing your limits on technical trails, this bike delivers the comfort, control, and capability to make every ride unforgettable.

Ready to upgrade your trail experience? The Merida Big Trail 500 is built to go the distance - and make every mile count.

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