My bicycle tool set for the bag under the seat. It's enough to do most anything required to get a bicycle working again. When you do a 150 mile ride in a target time of 12 hours or less for daylight as it's much to dangerous to ride 20-25 mph at night (even with lights), walking home 50 miles or more carrying a bicycle on your shoulder isn't an option. Calling someone to get you and telling them it will be a 100 mile or longer round trip would require miraculous divine intervention to get you a ride, and the Uber bill would be outrageously huge. You fix the bike so that it can be safely ridden and ride it home. I've had to do some roadside repairs and those that wrench their own bikes know how to get things working sufficiently on the side of the road with a compact tool set. The most important thing to avoiding roadside maintenance is inspection and preventive maintenance before commencing anything longer than a ride more than a mile or so from home.
Not shown as they're really not tools:
- Two inner tubes; you'd be surprised at how compact they are.
- Inner tube patches (in case you go through the two tubes)
- Tire patch kit to patch a tire casing hole (if it's small enough a US dollar bill or two can do the job as they're made of linen, not paper)
- Tire pump about 8 inches long and 1-1/2 inches in diameter; capable of at least 120 psi.
- Sub-miniature medical kit mostly for cuts and abrasions. This goes into a jersey pocket.
- Several Shimano chain link pins (explanation below with chain breaker).
- Four or five pairs of nitrile surgical gloves. Beats trying to wipe grimy black schmoo off your hands on grass (if there is any) and dirt.
Cyclists who carry enough stuff to fix a flat may recognize the yellow Pedro's tire levers at the top. Pedro's are the gold standard for getting a tire off a rim in a hurry without breaking the tire lever; metal ones are not only extra weight, they're very hard on alloy rims and a general "no-no" on carbon fiber ones. I don't use levers to put a tire back on as it's too easy to snake bite an inner tube pinching it with them. There is a way of rolling the bead back on if you practice it a few times and it doesn't require brute force. I've seen some diminutive women barely over 5 foot and 110 pounds soaking wet do it without struggling. Someone who's practiced at changing an inner tube can do it from start to finish in about 15 minutes, including inflating the tire. The main tools with SAKs for bookends are in the center.
- On the left is a chain breaker that can be used to break a chain and reassemble it. Master links are a thing of the past on multi-speed and track bikes. I carry extra link pins as the Shimano usually cannot be reused. The cutouts at the top are a spoke wrench and it doesn't show in the photo but they're different widths.
- The middle group is a 1/4" hex drive socket set with through ratchet, breaker bar and extension. The bits are the common Phillips and flat tip plus the metric hex used on a bicycle and a couple Torx. No reversing switch on the ratchet. Need to go in the other direction? flip the bit and ratchet over.
- To the right of that is another set of tire levers (black panels on tool holder), another breaker bar and more bits.
All those fit into a 1-1/2" x 2" x4" semihard case that's not shown.
The two SAKs are thin with only a two layers. If you were thinking one is a mondo, eight layer every tool Swiss Champ, guess again. They were selected specifically for this kit.
- Black one on the left is a 2-layer 74mm Executive, the least common size between the very common 58mm keyring Classic and the 84mm junior size. Has a large blade, small blade, scissors, file with pointed tip that can dig crud out of things, and the "orange peeler" has a very small flat tip driver at the end. Also has the ubiquitous toothpick and tweezers. Selected for the tool kit for the file, mini flat-tip and scissors. Photo is of another one I have with red scales.
- Red one on the right is a full size 91mm 2-layer Scientist (discontinued). It has a large blade, combination flat tip, can opener, bottle opener & wire stripper, magnifying glass, and in-line Phillips. Back layer has a corkscrew and the gray thing in the corkscrew is a tiny 1.5mm jeweler's flat tip, just the right size for nearly all eyeglass hinge screws. It has shallow exterior threads that allow it to screw into the corkscrew for storage. Behind the corkscrew near its pivot pin is a common sewing straight pin that slides into a hole under the scales; friction holds it in place. Selected this for the mangnifier, straight pin, tweezers and screwdrivers even though there are several flat tips in the 1/4" hex drive socket set. The corkscrew is a bonus.
Thought the very small 1/4" hex drive ratchet and bit set would be of the greatest interest, and how it's possible to pack a comprehensive tool set into a very small space.
John