Over many short tours in both the UK and abroad this is the list I've settled on. It should all fit in a decent sized single pannier whilst providing enough comfort for an enjoyable evening in the pub. If packed well it leaves plenty of space for a full day's food and an extra water bottle in hot weather.
Cycling kit
- Shorts
- Pants
- Base layer
- Jersey
- Jumper/fleece
- Waterproof jacket (cycling specific or lightweight walking ones are best)
- Socks
- Shoes
- Cycle gloves
- Vaseline/cyclists arse cream (optional but helps prevent chafing)
- Sunglasses
- Sunscreen
- Leg warmers / long legged shorts
- Overshoes
- Long fingered warm/waterproof gloves (depends how cold you get)
- Waterproof trousers (optional, I don't usually bother)
- Snood/neck warmer (I find the Buff style ones most useful and versatile)
Equipment
- 2x Water bottles
- Pannier rack
- Pannier (I prefer single to prevent overpacking but double is also okay)
- Lights (if heading at all offroad a headtorch often works well as a front light)
- Multitool (at least 1 with chain tool between group)
- Few cable ties (for emergency repairs)
- Pump (one per person is best, should be capable of the required pressure)
- 2x Spare inner tubes
- Puncture repair kit
- Tyre levers
- Bike oil (one between group is fine)
- Emergency sweets/energy food e.g. small bag of sweets, flapjack
- Spare brake pads/blocks (if likely to be needed)
- Lightweight lock (optional if staying somewhere with secure storage. I use a £3 one from a bargain store just to prevent walk-offs if I take one at all)
Useful repair tools
- Emergency chain link or chain pins to match your chain (for use with chain tool)
- Small adjustable spanner (one between group)
- Small pliers (one between group)
- Spare brake and gear inner cable (one between group)
- Spoke key (one between group)
- Few misc. bike nuts n bolts
Overnight kit
- 1x set of lightweight evening clothes minus jumper and waterproof which can be shared with cycling kit
- Pants (quantity according to your preferred hygiene level)
- Socks (as above)
- Lightweight shoes
- Toiletries (small are best if not provided)
- Earplugs (to combat those dorm snorers)
- Travel towel (if not provided, they usually are)