Boardman SLR 9.4 Carbon Ltd 2025

The Boardman SLR 9.4 Carbon Ltd is a lot of bike for the money. Fitted with one of SRAM’s latest wireless groupsets, deep-section wheels and a carbon cockpit, it has a spec list that many brands will view with envy. As if that wasn’t enough, you also get loads of versatility with mounts aplenty and roomy tyre clearance. From a financial perspective everything is covered, then, but what about the ride? Well, it’s nailed that too…

> Buy now: Boardman SLR 9.4 Carbon Ltd for £3,100 from Halfords

Boardman SLR 9.4 Carbon Ltd: Ride

Boardman launched the latest SLR range last year, creating a fast bike for all seasons and all kinds of road riding. It’s an impressive concept that I found worked well when I reviewed the SLR 9.0 Carbon earlier this year.

Like many brands, Boardman offers different frames throughout its line-ups. They share the same geometry and design but use a different grade of carbon, with this C10-framed 9.4 SLR being lighter and generally stiffer than the C7 frame of the 9.0 SLR.

The 9.0 SLR was a great bike to ride, but this C10 model is even better in terms of the quality; it feels firm and solid, while also having a smoothness to it – no harshness, no buzz. Regardless of the road surface, the 9.4 is a very comfortable place to be.

For comparison, I’d say the Giant Defy I reviewed recently and the Specialized Tarmac SL8 have the edge, slightly, in terms of ride quality, but Boardman is microscopically close with this one.

When James Ryan (Boardman’s brand & design manager) showed us the new SLR range he explained how the new bikes weren’t designed for a pro team but for general riders who want speed and performance, though not to the detriment of other things like comfort, or being limited to those dry summer days.

All of that is noticeable when you ride the SLR. It’s a quick bike when you want it to be. At just over 8kg it’s far from the lightest road bike out there, but that doesn’t stop it feeling responsive. It climbs well thanks to the stiffness at the bottom bracket, and it’s no slouch when it comes to hard accelerations.

Boardman has done some wind tunnel time, so it’s efficient on the flat, and it’s definitely quick enough to race on should you want to. But if you want to turn things down a notch, the geometry, which sits somewhere between full race and endurance, means you can cover a lot of distance at pace but in a more relaxed manner.

I could achieve a low enough position at the front for some aero advantages, while on longer outings riding on the hoods was comfortable enough to not awaken the crash-induced pains in my lower back and shoulders.

Boardman has got the handling spot on, too. Again, the head angle isn’t as steep or aggressive as a race bike, so there is no twitchiness through the handlebar, but I didn’t need to restrain my speed on technical downhill sections.

The SLR has a ‘complete’ feel to it; it’s not flustered anywhere, it takes everything in its stride, and while it may not be the fastest, stiffest or lightest road bike out there, it’s as close as it needs to be without compromising in other areas.

Boardman SLR 9.4 Carbon Ltd: Frame & fork

As mentioned above, the SLR has been to the wind tunnel. Given the ability to design frames with computer software these days – such as computational fluid dynamics (CFD) and finite element analysis (FEA), which can map 3D models of the frame and fork in terms of airflow and stresses when riding – it makes sense to design a bike to be as aero as possible, even when it’s not an aero race bike.

Boardman’s testing at the Silverstone tunnel showed that this new SLR is 5.7 watts faster than the outgoing model across a -15 to +15-degree sweep at 50km/h (31.1mph).

The SLR is definitely a clean-looking bike, helped by the fact that SRAM’s AXS groupsets are completely wireless, so it’s only the brake hoses that need running through the frame. The seatpost clamp is hidden inside the frame…

…and the integrated stem/handlebar also adds to the smooth look.

Away from all of this minimalism, the SLR is adorned with plenty of mounts including some for mudguards. They aren’t quite in what is considered the traditional place, being hidden on the inside of the fork legs and the seatstays, but full guards can be fitted with a bit of fettling to the stays. If you don’t fancy that, Boardman has worked with Fend Off to create some mudguards specific to the SLR.

As well as two sets of bottle cage mounts in the traditional places there is an extra set under the down tube, and those on the top of the down tube have three bolts to allow for some flexibility when running an internal frame bag.

The SLR has impressive tyre clearance, too, at 36mm, which gives some leeway for riding away from paved surfaces, allowing you to run some pretty big rubber for comfort. If you want to run full guards, the clearance drops to 32mm.

For the bottom bracket Boardman has specced a press-fit option and has included a universal derailleur hanger (UHD) at the rear dropout.

The SLR is available in five sizes, ranging from XS to XL, with corresponding top tube lengths of 525mm to 585mm.

Our medium test bike has a 555mm top tube, 151mm head tube and a 500mm seat tube. The head tube sits at an angle of 72.5 degrees, the seat tube at 73.5 degrees, with all of this adding up to stack and reach figures of 563mm and 388mm respectively.

Boardman SLR 9.4 Carbon Ltd: Groupset

The SLR 9.4 comes fitted with SRAM’s new Rival AXS groupset which was launched back in the summer. I reviewed it separately and concluded that it is one of the best groupsets on the market right now, and the best at this price point. You can read my full review, but I’ll give you the basics here anyway.

It’s a 12-speed, fully wireless groupset that has been around for a few years now, but with this latest launch (E1 model) it has seen some trickle-down tech and ergonomics from the top-tier Red group.

The biggest change is to the shape of the braking/gear shifting units which are now very comfortable to use, with a shape that feels natural in your hand. Their new design also allows for more powerful braking – you can bring the bike to a stop from high speed with literally one finger on the levers.

From a gearing point of view Boardman has specced a 48/35-tooth chainset and a 10-30T cassette, a setup I like a lot. The 48T chainring means I rarely used the small ring, so it’s efficient, and the 10T sprocket means you don’t lose out on top-end speed.

For the braking the 9.4 uses 160mm rotors front and rear, which offers loads of stopping power, and SRAM has improved their modulation over the years so you can brake as hard as you want, even on wet surfaces.

Boardman SLR 9.4 Carbon Ltd: Finishing kit

Away from the gearing you’ll find a carbon fibre seatpost which has the bonus of two position settings – inline or a 15mm layback. On top is a Prologo Scratch M5 PAS saddle. I like Prologo saddles, especially these short-nosed versions, and I like their firm padding too – I prefer not to have too much squidge in a saddle.

Up front Boardman has specced an FSA Vision Metron 5D ACR EVO fully integrated carbon cockpit. It’s a very comfortable handlebar with an aero shape, and it’s plenty stiff enough, too, so sprinting out of the saddle shows no signs of flex.

The bling doesn’t stop there with a set of Boardman’s 9 Series RD wheels with 50mm-deep carbon rims. These are tubeless compatible and ride really impressively, with a noticeable aero gain and plenty of lateral stiffness.

For this price it’s great to see wheels like this, and means the SLR doesn’t need any upgrades or improvements out of the box.

The tyres are Goodyear’s Eagle F1 R in a 30mm width – ideal for a mix of fast or endurance-based road riding.

When Emily reviewed them back in 2023 she was really impressed, and I concur. They’re grippy, durable and have a supple feel.

Boardman SLR 9.4 Carbon Ltd: Pricing & value

The SLR Carbon range starts with the £1,400 SLR 8.9, which has a Shimano Tiagra groupset and Boardman wheels, with the SLR 9.0 next in line at £1,800. The 9.2, with Shimano’s 105 Di2, costs £2,500, while a grand more sees an upgrade to the 9.6, which comes with Ultegra Di2 and Zipp 303 S wheels. Topping off the range is the SLR 9.8, which features SRAM’s Red groupset and a set of Zipp’s 404 Firecrest wheels for £5,500.

It doesn’t take much detective work to guess that this 9.4 sits between the 9.2 and the 9.6, and at £3,100 it’s good value for money compared with rivals.

The closest-matching Giant Defy, for example, is the Advanced Pro 1 at £4,999 (though there are some heavy discounts on Giant’s UK website at the moment, with the price cut to £3,749). It has a SRAM Rival AXS group, 36mm-deep carbon wheels and clearance for 40mm tyres, and it’ll take full mudguards. It includes a Giant power meter, too, but SRAM sells its left-hand power meter crank separately, so you could upgrade the Boardman if you wished for a couple of hundred pounds.

Ribble’s Allroad bikes are designed to be fast road bikes with added versatility, such as full mudguard mounts and room for 38mm tyres. The SL R models are the range-toppers, and a 105 Di2-equipped SL R Enthusiast with Mavic alloy wheels will cost you £3,199. None of the Allroad range of bikes I’ve tried have enamoured me, though – the geometry didn’t really work for me, and I found the ride quality pretty average.

Canyon’s Endurace range comes with 35mm of tyre clearance and extra mounting points, although no options for mounting full guards. The Endurace doesn’t have as racy a riding position or geometry as the Boardman, but Canyon does offer good value for money. The CF 7 AXS comes with a full Rival AXS groupset for £2,499, albeit with alloy shallow-section DT Swiss wheels and an alloy cockpit.

For a similar price to the Boardman (£2,999) you can have a CF 7 with carbon rim DT Swiss ERC 1600 wheels and Canyon’s carbon integrated cockpit, but a 105 Di2 groupset.

Both of those bikes use Canyon’s cheaper CF frames, while the higher-spec CF SLX frame models cost more. The CF SLX 7 Di2, for example, with a 105 Di2 groupset, DT Swiss ERC 1600 wheels, carbon cockpit and carbon ‘flex’ seatpost, is £3,749.

Merida’s Scultura Endurance is similar in a lot of ways to the Boardman. I tested the £2,250 Scultura Endurance 4000 in 2023, but the 6000 costs £3,300 and comes with a 105 Di2 groupset, alloy bar and stem, and Merida’s alloy-rimmed wheels.

For more options, check out our guide to the best road bikes, from aero to endurance.

Boardman SLR 9.4 Carbon Ltd: Conclusion

You can’t argue with the value of this bike, especially when you look at the spec list. And thankfully, it’s not just about the numbers. This bike has a great frameset and an excellent ride quality, plus the geometry and mounting points to make it a very versatile choice.

> Buy now: Boardman SLR 9.4 Carbon Ltd for £3,100 from Halfords

Verdict

Do-it-all road bike that masters it all, and at a great price

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