The right mudguard depends on one thing before anything else: whether your bike has eyelets. If it does, full-length mudguards will keep you driest. If it doesn’t, clip-on mudguards are your practical option. Everything else — materials, width, mudflaps — comes after that first check.
This guide covers the main types, what to look for on your frame, and what to consider before buying. For how to actually fit mudguards once you’ve chosen, see the step-by-step fitting guide.
Step one: check your frame for eyelets
Eyelets are small threaded holes drilled into the frame and fork — you’ll usually find them at the dropouts (where the wheel axle sits) and sometimes at the crown of the fork and the chainstay bridge. To fit full-length mudguards, you need eyelets on both sides of the front fork and both sides of the rear dropouts. Many dedicated commuter bikes have these built in; most road bikes don’t.
If your bike has eyelets, also check clearance — the gap between the tyre and the frame. You need roughly 10–15 mm of clear space around the tyre for a mudguard to sit without rubbing. Bikes sold as “mudguard-compatible” or “commuter-ready” almost always pass this check; some performance road bikes with narrow clearances do not, even when eyelets are present.
If your bike has no eyelets, full-length mudguards aren’t impossible — P-clips can sometimes substitute as frame attachment points, depending on your tube diameter — but clip-on mudguards are simpler and usually the better choice for most riders.
Full-length mudguards: best protection for most commuters
If your bike takes them, full-length mudguards are worth it. They cover a significant portion of both wheels and, critically, wrap close enough to the tyre to catch spray before it reaches you or the rider behind you. For someone cycling in the UK four or five days a week through autumn and winter, the difference between full-length mudguards and no mudguards is arriving at work noticeably drier.
Full-length mudguards mount at the brake callipers, the dropout eyelets, and the chainstay bridge behind the bottom bracket. Most come with metal stays that bolt at these points. The mudflap at the bottom of the front mudguard is particularly useful: it catches road spray thrown up before it hits your feet and the drivetrain.
Key buying considerations:
- Width: The mudguard should be at least as wide as your tyre, ideally 5–8 mm wider. A 35 mm tyre needs a mudguard rated for at least 35 mm. Check the packaging for tyre width compatibility.
- Material: Plastic mudguards are lighter and less expensive; aluminium (or stainless steel stays with a plastic guard body) tend to be more rigid and durable over years of use. For most commuters, plastic is perfectly adequate.
- Mudflap length: Longer mudflaps give better front-wheel coverage, particularly useful on the front mudguard where the spray angle is sharpest.
- Reflectors: Some mudguards include rear-facing reflectors integrated into the mudflap, which contributes to rear visibility without adding another attachment to your bike.
Check current prices on Halfords, Evans Cycles, or your local bike shop. Brands to look at include SKS (their Longboard and Chromoplastic ranges are widely available in the UK), Zéfal, and Crud.
Clip-on mudguards: the no-eyelet solution
Clip-on mudguards attach using brackets at the brake bolt (front) and the quick-release skewer or thru-axle (rear). They don’t need eyelets, which makes them compatible with road bikes, endurance bikes, and many hybrid frames that weren’t designed with mudguards in mind.
The trade-off is coverage. Clip-on mudguards don’t wrap as close to the tyre, and they’re shorter — they catch the worst of the spray but won’t keep you as dry as a full-length set in heavy rain. They’re removable in seconds, which suits riders who commute in mixed conditions and want the option to leave them off on dry days.
SKS Raceblade is the best-known clip-on option for road bikes. It attaches without eyelets and fits most standard road bike clearances. The stays clip on and off quickly once the mounting brackets are in place. Check current price before buying — the “Pro” and “Long” variants differ in tyre width compatibility (check the SKS website for the current range and which fits your tyre width).
For hybrid and city bikes without eyelets, look for clip-on mudguards with adjustable straps or P-clip mounts. These often fit a wider range of frame tube diameters.
Minimalist mudguards: a partial solution for short rides
Seat post-mounted mudguards (the Ass Saver is the most widely known example) clip under the saddle and deflect rear spray away from the rider’s back. They’re very light, pack flat, and cost little — but they’re not a substitute for full rear protection. Think of them as better than nothing rather than a genuine commuting solution.
A similar category exists at the front: small clip-on guards that sit behind the front fork crown. These catch some spray but leave your feet and lower legs largely unprotected.
For regular UK commuting, where roads are wet for months at a time, minimalist mudguards alone aren’t enough. They’re useful as emergency backup or for occasional dry-weather riders who occasionally get caught out.
Mudguard width and tyre clearance
This is the most common fitting mistake. A mudguard that’s too narrow won’t cover the tread edge of your tyre, letting spray shoot sideways. A mudguard that’s too wide sits further from the tyre and loses effectiveness.
The rule: match the mudguard to your tyre width, erring slightly wider. If your tyres are 32 mm, look for a mudguard rated for 32–38 mm. If you’re planning to switch to wider tyres (which many commuters do for comfort and puncture resistance), factor that into your choice now rather than buying again later. See our commuter bike guide for more on choosing the right tyre width for your setup.
Fitting tips
Even well-chosen mudguards can rattle or rub if fitted carelessly. A few things that matter during installation:
- Centre the mudguard over the tyre before tightening stays — an off-centre mudguard will rub on one side.
- Leave 5–10 mm of clearance between the tyre and the inner surface of the guard when tightening. Too close and road debris, or a slight buckle in the wheel, will cause contact.
- On full-length mudguards, trim the stays to length with a hacksaw or stay cutter if they’re too long — excess stay rattles and can work loose over time.
Full fitting instructions are in the mudguard fitting guide, which covers both full-length and clip-on types step by step.
Should you bother? (Yes, for UK commuting)
Mudguards aren’t exciting, but on a British commute they make a practical difference: less spray on your clothes, less grit reaching your drivetrain, and less water flung at the rider behind you if you cycle with others. Regular commuters who cycle through autumn and winter will find them worth the cost and minor faff of fitting. For occasional summer riders, clip-ons kept in a bag for bad days are a reasonable compromise.
If you’ve been commuting without mudguards and finding the experience unpleasant in wet weather — or if you’re getting through chains faster than expected — mudguards are one of the lowest-cost, highest-impact upgrades you can make. Basic bike maintenance covers how to keep your drivetrain clean once the guards are fitted.
Cycling in wet conditions takes some adjustment beyond gear alone — the cycling in the rain guide covers braking distances, visibility, and layering for UK weather.
Frequently asked questions
Do I need eyelets to fit mudguards?
You need eyelets to fit full-length mudguards in the traditional way. Without eyelets, clip-on mudguards are your main option, or full-length guards fitted with P-clips (which substitute for eyelet attachments on some frame tube sizes). Clip-ons work well for most riders; they’re just not quite as protective in very heavy rain.
What width mudguard do I need?
Match the mudguard width to your tyre width, going slightly wider rather than narrower. If your tyres are 28 mm, a guard rated for 28–35 mm is a reasonable choice. Check the packaging for the stated tyre width compatibility before buying.
Are plastic mudguards good enough?
Yes, for most commuters. Plastic guards are lighter and cheaper than metal alternatives, and they flex slightly on impact rather than cracking. Aluminium stays (which many plastic-guard sets include) add rigidity without much extra weight. After several years of daily use, plastic can fatigue at attachment points — at that stage, replacing the whole set is usually more cost-effective than repairing individual parts.
Can I fit mudguards to a road bike?
It depends on the frame. Road bikes with endurance geometry and wider tyre clearance often accept full-length mudguards if they have eyelets. Traditional racing bikes with narrow clearances typically don’t have the space, even when eyelets are present. Clip-on mudguards (SKS Raceblade being the most common UK choice) work on most road bikes without eyelets, provided there’s at least a small gap between tyre and fork/seatstay.
Do mudguards affect bike performance?
Marginally. Full-length mudguards add some weight (typically a few hundred grams for a full set) and a small amount of aerodynamic drag. For commuting purposes, neither is meaningful. The practical benefit of arriving less wet far outweighs any performance impact at commuting speeds.
