In my efforts to unlock the illustrious PMs feature (and I guess also review some stuff I've learned) I'll be posting notes here as I progress through different moto books and content. Aiming to do one post per day!
Starting with
Lee Park's Total Control 2nd Ed...
#1: Riding a motorcycle is an exercise in traction management. Traction available (TA) must always be greater than or equal to traction required (TR).
Methods to manage TA through Tires:
- Tire pressure. This is a trade-off between traction and longevity of the tire. Lower than stock tire pressure may give you a larger contact patch and thus more traction, however less longevity. Vice versa for higher. As a general rule, follow the manufacturer's guidelines.
- Temperature/Compound. More important with race tires, but the physics are universal: higher temperatures = more compliant rubber and thus greater traction, at the risk of exceeding its design temperature and degradation. Conversely, cold tires conform less to the road surface and will give you less traction.
- Age. Tires are perishable, and subject to dry rot/cracking/failing if left out for too long.
- Size/Profile. It's important to verify this, as the wrong size/profile can significant affect the location of the contact patch along your tire at max lean. In some cases, you may make it impossible for yourself/significantly lowering the size of your contact patch if you have the wrong tires for the job.
#2: How do you read your tire's sidewall?!
DOT XE K9 A171 3224
"DOT" - road-legal certification
"XE" - manufacturer plant and code
"K9" - tire size code
"A171" - brand code and characteristics
"3224" - first 2 digits is the week tire was made, last 2 digits is the year. So in this example, the tire was made in the
32nd week of 2024 (Aug 5-11).
Summary: Having the right tires and suspension are part of the foundation to CYA and ensure a functioning motorcycle.