The packing list for a bike outing will vary a lot. These are general packing lists to help with planning of Bike Adventures.
Helmet
MUST Fit Properly
MUST be Consumer Product Safety Commission (CPSC) certified
NO Helmet = NO riding on a Scout Outing
Appropriate Bike
Varies on Outing and Planned High Adventure
Road or Gravel bike for Paved Adventures
Gravel or Mountain for Gravel Adventures
Mountain Bikes are ok for paved and gravel, but will fall behind other bikes
Inner tubes
2 each
Sized properly for your bike
Rear Flashing Light
For ANY road outing
Water Bottles
2 Water Bottles
A bladder system (Camelback) is also acceptable
Eye Protection
Sunglasses
Clear lenses also work most of the time
Storage bag
Pouch on bike or backpack
Bike Pump
Mini pump
Mount on frame or place in backpack
Sunscreen
Reflectors
Front
Back
Wheels
Reflective stickers can be used
Bike Gloves
Any ride over 20 miles will need these
Tire Patch Kit
Patches
Tools
First Aid Kit
Main kit should be carried by group
Each Scout should have a mini First Aid Kit
Headlight
Required on any dawn, dusk or night outing
Bike Tools
Crankbrothers M19
Light Jacket
Great as windbreaker
Great when it rains
Great when it's cold out
Speedometer
Helps you track distance
Needed for navigation
Neon Yellow/Green Jersey
Helps you stay seen on the road
Bike Shorts
Helps prevent saddle sores
Money
We will ride by a lot of cafes, shops and ice cream
Kleenex mini-pack
Great for runny noses
Great for cleaning off grease on bike and blood on knees
Street Tires for Mountain Bikes
Consider switching to street tires if on a paved adventure
This will help a lot on paved roads
Bike Rack
More comprehensive repair kit
2x floor pumps
Disposable gloves
Assortment of zip ties
Duct tape
Real tool set
Sewing kit with heavy duty needles
Straight and curved needles
Tire pressure gauge
Shock pump if using full suspension bikes
Spare parts
Valve cores
Bulk Patches and Cement
Plugs, boots and Sealant for tubeless tires
Innertubes
Water bottle and rack bolts
Extra set of pedals - yup, these can break
Quicklinks and Quicklink tool
Chain links
Spare tires
Brake pads
Chain degreaser and oil
Clean rags
Soap and water
Wet Wipes
Extra Helmet
Extra Sunglasses
Dollar store glasses are fine
Extra Gloves
Spare Bike if you have the room
Comprehensive First Aid Kit