2025 Trek Madone SL 5 Gen 8 Road Bike
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The 2025 Trek Madone SL 5 Gen 8 Road Bike XL HEX BLUE is available at the following locations.
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The 2025 Trek Madone SL 5 Gen 8 Road Bike is a lightweight aero road bike that brings elite racing tech to a lower price point. It offers similar aero benefits to the pricier Madone SLR Gen 8, but with a more economical OCLV 500 Carbon lay-up and two-piece cockpit with hidden cable routing. It's built to race, with geometry that keeps you quick on the sprints yet in control on fast descents.
The Madone SL 5 Gen 8 is the perfect bike for someone looking for superbike performance at a lower price point. It offers the same frame tech as its SLR sibling, like aero tube shaping and lightweight IsoFlow comfort tech, but with a more economical build that leaves budget to spare for race entry fees and bike trips.
The Madone SL 5 comes with a 2x12 Shimano 105 group set that delivers clean mechanical shifts without the faff of electronic group sets. Tubeless wheels that help fight punctures while reducing rolling resistance, and hydraulic disc brakes.
This bike is perfect for
Road cyclists who want a featherweight road race bike without top-end race pricing. You're up for racing, club rides or solo spins up and don't want to compromise between climbing efficiency and aerodynamics. You're happy with more economical components that help you get on your dream bike faster.
Key Features
- The Revolutionary Full System Foil aero tube shapes redefine what fast looks like and help optimise aerodynamics around the whole bike
- A more economical 500 Series OCLV Carbon frame and new tube shaping shave weight where it matters most to help you fly up climbs
- You get clean and reliable shifting without breaking the bank with Shimano's workhorse group set – 105
- Lightweight, race-focused IsoFlow comfort tech helps you ride stronger longer without sacrificing weight or aerodynamics
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 - 500 Series OCLV Carbon, Full System Foil tube shaping, IsoFlow seat tube, RCS Headset System, electronic or mechanical routing, removable aero chain keeper, T47 BB, flat mount disc, UDH, 142x12 mm thru axle
Fork - Madone Gen 8 full carbon, tapered carbon steerer, internal brake routing, flat mount disc, 12x100mm chamfered thru axle
Shifter - Shimano 105 R7120, 12-speed
Front derailleur - Shimano 105 R7100, braze-on, down swing
Rear derailleur - Shimano 105 R7100, 36T max cog
Crank - Shimano 105 R7100, 50/34
Bottom bracket - Praxis, T47 threaded, internal bearing
Cassette - Shimano 105 7101, 11-34, 12-speed
Chain - Shimano SLX M7100, 12-speed
Wheel front - Bontrager Paradigm SL, Tubeless Ready, 21 mm rim width, 100x12 mm thru axle
Wheel rear - Bontrager Paradigm SL, Tubeless Ready, 21 mm rim width, 142x12 mm thru axle
Hub front - Bontrager alloy, sealed bearing, CenterLock disc, 100x12 mm thru axle
Skewer front - Bontrager Switch chamfered thru axle, removable lever
Hub rear - Bontrager alloy, sealed bearing, CenterLock disc, Shimano 11-speed freehub, 142x12 mm thru axle
Skewer rear - Bontrager Switch chamfered thru axle, removable lever
Rim - Bontrager Paradigm SL, Tubeless Ready, 24-hole, 21 mm width, Presta valve
Spokes - 14 g stainless steel, black
Tyre - Bontrager R1 Hard-Case Lite, wire bead, 60 tpi, 700x28 mm Max tyre size - 32 mm
Saddle - Bontrager Aeolus Comp, steel rails
Seatpost - Madone aero carbon seat post, 0 mm offset
Handlebar - Bontrager Comp, alloy, 31.8 mm, 80 mm reach, 121 mm drop
Stem - Trek RCS Pro, -7-degree
Brake rotor - Shimano RT70, CentreLock, 160 mm
Rotor size - Max brake rotor sizes: 180 mm front, 160 mm rear
Weight - ML Size - 8.70 kg / 19.19 lbs (with tubes)
Weight limit - This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 125 kg (275 lb).
| Colours | HEX BLUE, MATTE DEEP SMOKE |
| Sizes | L, M, ML, S, XL, XS |
| Brand | TREK |
| Model Year | 2025 |
| Barcodes | 601842991589, 601842991596, 601842991602, 601842991619, 601842991626, 601842991633, 601842991640, 601842991657, 601842991664, 601842991671, 601842991688, 601842991695 |
| SKUs / Part Numbers | 5319920, 5319921, 5319922, 5319923, 5319924, 5319925, 5319926, 5319927, 5319928, 5319929, 5319930, 5319931 |
Please note: Manufacturers can sometimes change the specification of the products from time to time.
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Comfort Guarantee
Opinions of contact points such as saddles, shoes and grips can vary a lot between different riders. If you buy a contact point from Cycles UK and you don’t find it comfortable, you can return it within 30 days, and we’ll swap it for something else.
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Please note the above quotation is an indicative cost and actual monthly payments may vary by +/- 2p per month.
Credit subject to status and affordability. Terms & Conditions Apply. Cycles UK Ltd is a credit broker and is Authorised and Regulated by the Financial Conduct Authority. Credit is provided by Novuna Personal Finance, a trading style of Mitsubishi HC Capital UK PLC, authorised and regulated by the Financial Conduct Authority. Financial Services Register no. 704348. The register can be accessed through http://www.fca.org.uk.
24 Month Representative Example:
Purchase Price (incl. VAT) £750
Deposit £75
Loan Amount £675
Interest/Total Charge for Credit £109.32
Total Amount Repayable £859.32
Balance Payable £784.32
By 24 Monthly Repayments of £32.68
15.9% APR Representative
Bank rate of interest 8.1% PA fixed
Please note the above quotation is an indicative cost and actual monthly payments may vary.
For Buy Now Pay Later and Deferred Interest Bearing Credit: Interest is charged from day 1 of your agreement, but not charged on any repayments made during the deferral period. On expiry of the deferral period, interest accrued during the deferral period will be applied to your repayments.
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