Ex Demo Brompton G Line Roller Frame 2026 Gravel Folding Bike - Medium
Technical specifications
Description
This bike shows light signs of use, otherwise the condition is excellent. Please inspect the images before making a purchase.
All our Ex Demo models are covered with the same 18-month warranty as our brand new bikes.
Expertly engineered to go where others can’t. G Line is the first ever Brompton with the ride feel of a full-size bike. Brand-new geometry, 20” wheels, game-changing comfort and capability. All holistically designed around the fold that made us famous. It's your one-bike solution to the city and beyond.
Happily delivering on all sorts of surfaces. Confident in all conditions. Comfortable hour after hour. G Line is expertly engineered to give you everything you need for the rough, the smooth and the beautiful.
And with the original Brompton fold, the ever-ready G Line transforms into a compact, locked package in under 20 seconds. Goes on trains. Travels in car boots. Stores in small spaces (including one-person tents).
In a world full of possibilities, G Line is your one-bike route to everywhere.
The most versatile bike in the world
Expertly engineered to go where others can’t. G Line is the first ever Brompton with the ride feel of a full-size bike.
20” wheels
Big enough for any adventure yet compact enough to fit inside the fold. The G Line’s solidly built 20” wheelset comes equipped with custom-made puncture-resistant tyres.
Hydraulic disc brakes
Super dependable stopping power. The first ever Brompton to come equipped with disc brakes for all-terrain, all-weather riding.
Wide platform pedals
The grippiest, most comfortable Brompton pedal set. The left-hand pedal can be released with a quick squeeze and pull to make your folded bike even more compact.
Wide handlebars
Stay in control. With the custom-made handlebars, G Line gives you exceptional stability – from leverage on uphills and rough ground to comfort on longer rides.
Ergonomic grips
Every touchpoint between you and the bike is designed with comfort and control in mind.
G Line sizes
G Line comes in three easy-to-choose sizes based on your height. Small, medium or large. The single-size frame has varying stem and seatpost heights, developed and tested with a world-leading bike fit expert for the best ride experience.
Big on-ride feel, compact
We created G Line to be the best one-bike solution for the city and beyond, and then we made it a Brompton. The frame geometry is comparable to a full-size bike, yet it transforms into a compact package that stores and travels easily. So you can go anywhere.
The most capable Brompton ever
Rigorously tested over 250,000 km, first to meet industry standards, then to meet ours, G Line goes where others can’t. Now, you can confidently tackle everything from dusty singletrack to rain-soaked cobbles. This bike does it all with ease.
Game-changing comfort
Nothing feels like G Line – the entirely new frame, all-new 20” wheels, our widest ever handlebars and tyres. Everything is thoughtfully engineered to give the balanced feel of a mountain bike and all-day comfort that’s nothing short of joyous. You’ll feel the difference on every ride.
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Frequently asked questions
I'd like to buy this item. How do I proceed?
You can buy this bike right now at the asking price. Click and go straight to checkout.
If you'd rather negotiate, here's how it works:
- Make an Offer:
Start by submitting an offer to the seller. You can offer the asking price or suggest a lower amount, it's up to you! The seller will then have the option to accept, decline, or make a counteroffer. - Secure Payment:
Once the seller accepts your offer, you'll receive a payment link via email. You can securely complete your purchase using a credit/debit card, PayPal, or Klarna. - Order Confirmation:
After payment, the seller will receive an order confirmation so they can arrange fulfilment of the bike.
You can either collect the bike in person or arrange to have it shipped to you by our specialist delivery partner.
I'd like to negotiate the price, how do I do this?
Whether you would like to purchase the bike for asking price, or try to get a better deal, we ask all buyers to submit an offer to the sellers first. Once an offer is accepted, you will be sent a payment link to complete the purchase!
- Click the "" button on the listing page.
- Enter your contact details and the amount you'd like to offer.
- The seller will either accept, decline or make a counteroffer.
- You will receive the outcome via email so keep your eyes peeled!
- Once you've agreed on the price, you'll be sent a payment link to complete the purchase.
- Your new bike will be shipped to you!
How can I contact the seller?
If you would like to ask the seller a question about the bike, then please use the Contact seller button above. The seller will receive your question by email.
If you have any questions on shipping, collections or returns, then feel free to reach out to us directly.
How long does delivery take, and how much does shipping cost?
Shipping costs are fixed at £89 no matter where you're living in the U.K.
We aim to deliver your new bike within 4-7 days* of placing an order. Here's the process:
- Once an order is placed, we contact the seller to arrange a suitable date for our delivery partner to collect the bike.
- The bike will then be delivered to you, typically the same day it's been collected from the seller.
- You're ready to ride! Our couriers collect and deliver the bikes without the need for them to be disassembled.
*Please note that delivery times may be longer if the seller is not at home for the couriers to collect the bike within the 4-7 day period.
Can I collect in person?
Yes! You can collect the bike from the seller yourself. We ask that you agree on a price first and follow the standard checkout process before arranging the meet-up.
This ensures that all transactions are completed securely on the MyNextBike platform.
Collection process
- Agree on a price with the seller
- Complete the purchase: You will be sent a payment link to finalise the transaction.
- Select "Collect in Person" at checkout
- Arrange the collection or viewing date
- Confirm whether you leave with the bike
Can I test ride the bike first?
Yes you can! It's the same process as if you are collecting the bike. We ask for buyers to agree a price first and follow the standard checkout process. This ensures that all transactions are completed securely on the MyNextBike platform, allowing us to provide buyer and seller protections.
How does buyer protection work?
Our Buyer Protection policy is in place to prevent any mis-selling on the platform and ensure you get exactly what you paid for! If the bike arrives "not as described", such as there is damage that wasn't disclosed in the listing, or the specifications are wrong, then you can return it to the seller free of charge. Simply contact our support team and we will arrange this for you. To learn more, please read here.