The Short Answer
Buy a road bike if you mainly ride on tarmac, prioritise speed, and like the focused feeling of a racing machine.
Buy a gravel bike if you want one bike that handles everything, roads, towpaths, bridleways, light trails, and bikepacking.
If you're still unsure, buy the gravel bike. It's the more versatile choice, and you can always fit slick tyres for faster road riding. You can't fit knobbly tyres on a road bike.
Key Differences
| Feature | Road Bike | Gravel Bike |
|---|---|---|
| Tyre width | 25-32mm | 35-50mm |
| Geometry | Aggressive, low front end | Relaxed, more upright |
| Speed on tarmac | Faster (by 1-3 km/h at same effort) | Slightly slower but more comfortable |
| Comfort | Depends on frame; can be harsh | Generally more forgiving |
| Off-road capability | None to minimal | Moderate, gravel, towpaths, light trails |
| Mudguard/rack mounts | Sometimes | Almost always |
| Weight | Lighter (7-9 kg typical) | Heavier (8.5-11 kg typical) |
The Case for Road
If you know you'll ride exclusively on tarmac, club rides, sportives, commuting on paved roads, a road bike is more efficient. The narrower tyres, lighter weight, and more aerodynamic position add up. Over a 100km ride, you'll arrive 10-20 minutes earlier on a road bike than a gravel bike, assuming the same fitness.
Road bikes also tend to offer better value at the same price point, because manufacturers can spend the budget on drivetrain and wheels rather than tyre clearance and mount points.
Best used road bikes for value (UK market):
- Canyon Ultimate CF, direct sales means lower new price, but still commands good resale
- Specialized Allez Sprint, aluminium frame that punches well above its weight
- Giant TCR Advanced, consistently undervalued on the used market
- Trek Domane, endurance geometry, brilliant for UK roads
The Case for Gravel
The UK has 140,000 km of bridleways and byways. A gravel bike unlocks all of them. It's also a better commuter (can handle potholes, cobbles, and canal towpaths), a better touring bike (rack and mudguard mounts), and a better winter bike (wider tyres, more clearance for mud).
Gravel has also become the fastest-growing category in UK cycling. More new gravel bikes means more used gravel bikes coming to market, prices are falling.
Best used gravel bikes for value (UK market):
- Canyon Grail, the benchmark, excellent resale
- Specialized Diverge, comfortable geometry, good spec
- Trek Checkpoint, solid all-rounder
- Giant Revolt, consistently the best value in the category
- Ribble CGR, UK brand, great spec for the money
Resale Value
Road bikes have a longer track record on the used market, so pricing is more predictable. Gravel bikes are newer as a category, which means:
- Premium gravel bikes (Canyon Grail CF, Specialized Crux) hold value exceptionally well due to demand
- Budget gravel bikes depreciate faster because the category is still evolving rapidly
The Hybrid Question
Some people considering road vs gravel are actually better served by a hybrid or flat-bar gravel bike. If you don't want drop handlebars, don't force yourself into them. A good hybrid (Trek FX, Specialized Sirrus, Giant Escape) costs less, is easier to ride, and handles commuting brilliantly.
Make the Decision
- Where will you ride? If it's 90%+ tarmac, get a road bike.
- Do you want one bike for everything? Get a gravel bike.
- Are you new to cycling? Gravel bikes are more forgiving and versatile.
- Do you race or do group rides? Road bike, you'll get dropped on a gravel bike.
Whatever you choose, check our sold prices to see what specific models are selling for, and use the valuation tool to price your current bike if you're trading up.
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