2021 Trek Domane SL 4 Road Bike

£1,627.50  £2,325.00
Colour:

SLATE/RADIOACTIVE RED

Size:

50

Part Number:

585365

GTIN/UPC:

601842122389

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The 2021 Trek Domane SL 4 Road Bike is all about smooth riding, speed and versatility. The lightweight OCLV Carbon frame has both Front and Rear IsoSpeed to smooth out bumps in the road and reduce fatigue so you can stay stronger on long adventures. The Shimano Tiagra 10 speed gears and hydraulic brakes give good performance at a budget friendly price.

The Domane SL 4 is built around a 500 Series OCLV Carbon frame with road-smoothing Front and Rear IsoSpeed. IsoSpeed works a little like suspension. It allows parts of the bike to decouple in a controlled way to absorb bumps, rather than sending a shock up through the frame. He effect is to smooth out bumpy roads and reduce the shock from potholes and cracks so you can carry your speed, keep the power down and not get as tired. The Domane bikes are race fast but designed to be used on long all-day adventures.

The Domane SL 4 comes with powerful flat-mount disc brakes, a full 2x10 Shimano Tiagra group set and tubeless-ready wheels with wider 700x32 tyres. Internal storage and cable routing add to the bike's capability and sleek look.


This bike is perfect for

Riders who want a fast road bike that can handle long all day endurance rides even on the bumpiest and most potholed back roads. Want to hit up some cobbles? It can handle that as well. With budget friendly Shimano Tiagra running gear the Domane SL 4 is great value for money.

Key Features

  • This bike is super versatile, super smooth and equally suited to racing, club rides and all-day adventures on the open road
  • Road-smoothing IsoSpeed absorbs fatiguing bumps in the road for a faster, smoother, more comfortable ride
  • A sleek internal storage compartment gives you a versatile spot to stow tools and gear
  • The stable Endurance Geometry is comfortable over long distances, but this is still a quick racing bike

Guide To Road Bike Gears

If you are buying a road bike one of the big differences between models will be which gears they use. Most manufacturers will make the same bike, using the same frame but putting different gears and wheels on it. So for instance you can buy a Trek Domane AL 2 Disc with Shimano Claris gearing for £975 or get the Trek Domane AL 4 Disc with Tiagra gearing for £1625. They are fundamentally the same bike. One comes with the Shimano Tiagra gears and the other comes with Shimano Claris gears.

In most cases, the bottom of the range gears and top of the range gears will basically work in the same way. The big differences are in the quality of material used and the weight. Top of the range gears will be lighter and smoother to use.

One thing to watch out for when comparing bikes is whether the full groupset is being used. If you are buying a bike that has Shimano 105 gears on it. Shimano makes 105 brakes, gear levers, front and rear derailleurs, cranks, chainrings and bottom brackets. So basically all of the running gear on the bike. Some bike manufacturers will fit the full groupset, others will fit Shimano 105 front and rear derailleurs but use their own brakes and cranks to save a few pounds. So if you are comparing bikes be sure to check how much of the groupset the bike actually uses.


Read our Guide to Road Bike Gears

Road Bike Buying Guide

Nothing beats the feeling of effortless speed you get on a road bike. There are lots of reasons to ride a road bike, from the simple joy of it, to racing, long distance challenges, or café rides with friends. Whatever you want to do there will be road bike out there for you.

Men’s and Women’s road bikes

Nearly all manufacturers have stopped making dedicated men’s and women’s bikes. They are now all unisex. What you will see is that on smaller bikes, brands will often fit a wider saddle (generally more female friendly). On larger bikes they will often fit a narrower one (generally more male friendly).

Disc or rim brakes

It is getting increasingly hard to buy new bikes with rim brakes as the industry has almost exclusively switched to discs. The reasons for this are pretty simple. Disc brakes are much, much, more powerful than old rim brake systems so you can stop a lot more easily and safely. Disc brakes also allow much bigger tyres to be fitted which is more comfortable. Older disc brake systems did often suffer from rubbing and squeaking. While this hasn’t been completely fixed yet it is much less common on modern bikes with hydraulic brakes. Mechanical disc brakes can still take a bit of fettling to get them right so go for hydraulic if you can.

Read our full road bike buying guide

Price Match at Cycles uk

We understand that price is important, so we regularly price-check our competitors to make sure we have the best offers available. We recognise that we will not always be the cheapest, so if you see the same product cheaper from any of our competitors then please get in touch via the form below and we will do our best to match any reasonable advertised price.

Trek made their first bikes in 1976 in a barn in Wisconsin. Now they’re one of the biggest bike brands in the world. Trek bikes cover everything from professional-level road and mountain bike race bikes to commuters, hybrids and kids bikes. There is a strong heritage of racing at Trek and many Trek bikes have a strong race influence. They take a very scientific approach to researching bike and human performance and then make the fastest and most efficient bikes they can.

It doesn’t stop their attention and passion for cycling flows through everything they do. Since the 1990s, Trek has supported Places for Bikes. Places for Bikes is an advocacy organisation in the USA that gets more people on bikes more often! Places for Bikes ethos falls in line with the companies mission statement to:

Build only products we love. Provide incredible hospitality to our customers, and change the world by getting more people on bikes.

Frame Size 50, UNI, Carbon, 500 Series OCLV Carbon, front & rear IsoSpeed, BITS internal storage, tapered head tube, internal cable routing, micro-adjust seat mast, 3S chain keeper, DuoTrap S-compatible, mudguard mounts, flat-mount disc, 142x12 mm thru axle
Wheel Size Front 28
Wheel Size Rear 28
Fork Domane SL carbon, tapered carbon steerer, internal brake routing, mudguard mounts, flat-mount disc, 12x100 mm thru axle
Fork Unknown
Gears DERAILLEUR, SHIMANO, Shimano, 1 Gears
Tyres BONTRAGER, Bontrager
Tyres UNKNOWN, Unknown
Tyres UNKNOWN, Unknown
Shifters SHIMANO, Shimano Tiagra R4725, short-reach lever, 10-speed // Shimano Tiagra R4725, short-reach lever, 10-speed,
Kickstand UNKNOWN, Unknown
Front Brake SH, SHIMANO, Shimano Tiagra hydraulic disc // Shimano Tiagra hydraulic disc Shimano SM-RT70, CenterLock, 160 mm, Shimano, Disc brake with hydraulic actuation
Rear Brake SH, SHIMANO, Shimano Tiagra hydraulic disc // Shimano Tiagra hydraulic disc Shimano SM-RT70, CenterLock, 160 mm, Shimano, Disc brake with hydraulic actuation
Front Derailleur SHIMANO
Rear Derailleur SHIMANO
Crankset UNBRANDED
Chain SHIMANO
Handlebar BONTRAGER
Stem BONTRAGER
Bartape / Grips BONTRAGER
Seatpost BONTRAGER
Saddle BONTRAGER
Front Light UNKNOWN
Rear Light UNKNOWN
Colours SLATE/RADIOACTIVE RED
Sizes 50
Brand Trek
Model Year 2021
Barcodes 601842122327, 601842122334, 601842122341, 601842122358, 601842122365, 601842122372, 601842122389, 601842141847, 601842141854, 601842141861, 601842141878, 601842141885, 601842244098, 601842244104, 601842244111, 601842244128
SKUs / Part Numbers 585365, 585366, 585367, 585368, 585369, 585370, 585371, 585453, 585454, 585455, 585456, 585457, 596507, 596508, 596509, 596510

Please note: Manufacturers can sometimes change the specification of the products from time to time.

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