Rain is a solvable problem. A jacket that breathes, fenders, a way to keep your feet tolerable and lights you leave on make most wet commutes comfortable. What changes for safety is braking: allow clearly more distance, and ride smoother on slick surfaces.
Braking and cornering in the wet
Water, grit and slick surfaces all reduce grip, and on rim-brake bikes the water also gets between pad and rim. Sheldon Brown’s rim-brake guide notes that wet rims reduce brake effectiveness drastically with cheap steel rims and moderately with aluminum ones. Disc brakes cope better: Sheldon Brown’s disc-brake article says they are little affected by wet conditions and work better in the wet than rim brakes, though they can howl when wet. Even so, wet pavement gives every tire less to hold on to, so allow extra distance whatever the brakes.
There is no precise rule for how much further a bicycle needs to stop in the rain, because it depends on tires, brakes, rider and surface. The UK Highway Code’s rule that drivers should at least double the gap on wet roads is a driver rule about following distance, not a measured figure for bicycles, so treat it only as a rough benchmark. Allow extra room, start braking earlier, and brake in a straight line before a corner rather than in it.
- Surfaces to treat as slippery: painted lines and symbols, metal covers and gratings, tram or rail tracks, wet leaves and mud. Cross metal and paint upright and without braking or turning.
- Cornering: slow down before the bend, keep the bike more upright, and avoid hard braking mid-turn.
- Tread will not rescue you: Sheldon Brown makes the point that all tires are slippery on wet paint stripes and metal, and tread features make no improvement there.
If the bike stops noticeably worse than it did dry and the cause is not just wet rims, such as pads worn thin, a lever pulling close to the bar or squealing and juddering, stop riding it and have a bike shop inspect the brakes. Our brake servicing guide covers what is safe to check yourself.
Tire pressure: be careful lowering it
You will see advice to drop road tire pressure a lot in the rain. The evidence is thin, and the downside is real. Sheldon Brown lists inflation pressure, rubber formulation and tread pattern as the three things that determine traction, so pressure matters, but he also warns that an underinflated tire is prone to pinch flats (the tube is pinched against the rim, usually after hitting an edge).
A safer route to wet grip is tire choice. A wider tire generally gives better cornering traction than a narrower one, provided it is inflated appropriately. If you run narrow tires at the top of their range, a small reduction within the pressure range printed on the tire sidewall is reasonable; going far below it is not.
Clothing
A waterproof jacket does most of the work, but it must also let sweat out or you will be as wet from inside as outside. Look for a breathable fabric, vents and a longer back panel; see our guide to affordable waterproof cycling jackets. A thin cap under the helmet keeps rain off your face.
Feet are the hardest part. Many riders find that overshoes help, but few keep feet fully dry in sustained heavy rain, so a spare dry pair of socks at work is worth carrying. For cold-weather layering see what to wear cycling in winter.
Fenders
Sheldon Brown’s fender article says fenders make a tremendous difference on roads wet from drizzle, recent rain or snowmelt, and that if you ride in the rain with other cyclists a mudflap on the rear fender is good to have. If your frame lacks mounting points, a clip-on rear fender is better than none.
Be seen
Spray and low light reduce how far drivers can see you. In heavy rain, many riders switch lights on in daytime too. The lighting requirement described here is the UK one: the Highway Code says that at night a cycle must have white front and red rear lights lit (Rule 60), and that flashing lights are permitted. Other jurisdictions have their own rules, so check yours. The Highway Code also notes that light-colored or fluorescent clothing helps others see you in daylight and poor light, and reflective items help in the dark. See commuter bike lights for what to look for.
Looking after the bike
Rain, mud and grit speed up chain and brake wear; Sheldon Brown lists whether a bike is ridden in rain or snow as one factor in chain durability. After a wet ride, wipe the frame and rims, dry the chain and re-lube it with a lubricant made for wet conditions, following the maker’s instructions. Check brake pads more often in the wet season. Rinse off heavy road grit gently rather than with a pressure washer; our bike washing guide explains why. A quick look over the bike before riding (pre-ride checklist) catches loose fenders and soft tires.
When you get home, change out of wet clothes promptly and hang the jacket and gloves to dry.
When not to ride
Skip or shorten a ride in thunderstorms, ice, hail, flooded roads or when visibility is very poor. Light to moderate rain is a matter of preparation, not courage. For general road positioning, see the basic rules of cycling on roads.
Sources
- Sheldon Brown: Rim Brakes
- Sheldon Brown: Bicycle Tires and Tubes
- Sheldon Brown: Bicycle Disc Brakes
- Sheldon Brown: Fenders For Your Bicycle
- Sheldon Brown: Chains
- GOV.UK: The Highway Code, general rules 103 to 158
- GOV.UK: The Highway Code, rules for cyclists 59 to 82
Last reviewed: October 2026.