Anything mechanical will breakdown, especially if used by a scout. Part of biking is learning how to maintain and repair you gear.
Bike Multi-Tool
Ideally with chain breaker
Examples:
Crankbrothers M19
Very affordable
All the tools you need
Blackburn Tradesman
Economical option
Little heavier than others
Lezyne Super V 22
Great tool set
Easy to use with great leverage
bit pricy
Pedro's Rx Micro-20
ToPeak Ninja 16+
ToPeak Mini PT30
Multi-tool with pliers
Use for all sorts of repairs
Pulling thorns
Sewing up tires
Pouch to hold gear
Example
Specialized KEG
Tire Levers
Example
Pedro's Tire Levers
Spare Tubes
1 for short rides
2 for longer rides
Carry even if running tubeless tires
Some will carry Ultralight tubes if running tubeless tires
Tubolito ultralight inner tube
Mini Pump
Example
OneUp 100cc EDC Pump
Tubed Tire Kits
Patch and cement kits are best for long term repairs
Patches with Cement
Considered more durable and longer lasting that patches that don't use cement
Use this option if you want to continue to use your tube
Preglued Patches
No Cement required
Easier to repair tube
Easy to pack just patches
Considered a temporary fix
May last 2+ weeks
NEED to be replaced later
Replace tube when you get home
Glue can dry out over time
Examples
Rema Tip Top Puncture Repair Kit
Classic patch kit
Park Vulcanizing Patch Kit
Seem to stick better than others
NOT to be confused with their pre-glued Super Patch
Lezyne Smart Kit - Temporary Option
No-Glue option
Used for quicky repairs
Temporary - you need to replace them or the tube in 2 weeks
So small - can be taped under seat
Rema Patches - BULK Option
Buy these in bulk for mass repairs
Purchase cement separately
Rema Tip Top Vulcanizing Fluid
Slime Vulcanizing Cement
Elmer's rubber cements kind of works but is NOT recommended
Tubeless Tire Kits
How to run and repair tubeless tires: bikepacking.com/plan/tubeless-tire-repair-guide
Tire Plugs
For punctures greater than 3/16″
Examples
Dynaplug Micro Pro
Dynaplug Pill
Sewing Kit
Used for tire sidewall and bag repairs
Need
Curved needle
Thread
Tire Boots
Use to patch larger holes on the inside of a tire
Examples
Park Tool TB-2 Emergency Tire Boots
Good for large repairs
Velox Tubeless Repair Kit
Traditional tire boot
Larger kit - maybe better for home repairs
Lezyne Smart Kit
Comes with 6 tube patches and a tire boot
Gorilla Tape may work in the pinch
Extra Sealant
Don't forget injector or a fill tube/cap
Examples
Orange Seal Endurance
Store in 2 oz Nalgene HDPE bottles
Stans-No Tubes Tire Sealant 2-Ounce Bottle
When out on high adventure, you'll want a bigger repair kit as any breakdowns can leave you stranded for days away from civilization
15mm Wrench
Needed for some old school hubs and Rohloff drivetrains
Example
Portland Design Works 3wrencho
doubles as a tire lever
Zip Ties
Can be used for many repairs
Weigh very little
Gorilla Tape
Gorilla Tape can be used to repair many different items from bags to shoes to securing gear to you bike
Wrap a few layers around your bike pump so you always have some
Quick Chain Links / Powerlinks
2-3 pair of links of the size you are using
Make sure you have a chain tool
Example
SRAM Powerlinks
Chain Lube
Clean and lube your chain every couple of days
Dry lube is better in dusty conditions (like Eastern Washington)
Wet lube can collect grit on the chain and cassette
Example Dry Lube
Rock N’ Roll Absolute Dry
Examples of Wet Lube
Rock ‘n Roll Gold
Dumonde Tech
Spare Cleat and Bolts
A lost cleat or bolt will mess up your ride
If running clipless pedals, bring extra bolt and cleat
Heavy Duty Air Pump
It's really nice to have a real pump
Scout Leaders have carried full sized floor pump on the Palouse Trail
Examples
Lezyne Micro Floor Drive HV