MasonDefinition
Mason's aluminium all-road bike.
- Endurancetype
- Aluminiumframe
- 2listings now
Typical used price
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too few listings
Typical new / ex-demo
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too few listings
View on eBay →
Updated 1h ago
Price history
eBay UK · median Buy It Now asking price
We started tracking this bike on 20 Oct 2026. The chart fills in as we record prices each day.
2 listings
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Mason Definition Road Bike 50cm Small 700c Shimano 105 Disc Brake Vela DN9
Used
105 50cm · XSAluminiumDisc brakes distillabmxin2014 · 100% · 417 feedback£1,102 incl. £75 delivery Not enough data -
Mason Definition 52cm with Shimano Ultegra, Hunt Wheels, and Mudguards SE6
Used
Ultegra 52cm · SAluminium jo350972 · 100% · 18 feedback£1,904 collection or postage not shown Not enough data
Only seeing UK listings. Compare all 5 countries →
Before you buy a used Definition
- Get the frame size right first. A bargain in the wrong size is no bargain. Check the seller's size against our size guide, and ask for the stack and reach if you're between sizes.
- Check it isn't stolen. Ask for the frame serial number (usually under the bottom bracket) and check it on BikeRegister. A genuine seller won't mind, and a receipt is a good sign.
- Confirm the groupset and wheels. Titles often say "Ultegra" when only the gears are. Ask what the brakes, chainset and wheels are, and how worn the chain and cassette are.
- Pay through eBay. eBay's Money Back Guarantee covers items that don't match the description, but only if you pay through eBay.
- Collection or courier? Many bikes are collection only. If it's being posted, ask how it'll be packed: a proper bike box with the derailleur protected.
Questions
How much is a used Mason Definition worth?
There are too few used Mason Definition listings on eBay UK right now to give a reliable typical price. Choose "All countries" to see listings from 5 eBay sites.
What type of bike is the Mason Definition?
Mason's aluminium all-road bike. It's a endurance bike and most are aluminium.
What sizes of Mason Definition are for sale?
Right now the most listed sizes are XS (1), S (1). Use the frame size filter, or our size guide if you're not sure of yours.
