Question 1

Why does tire casing affect what pressure I should use?

Accepted Answer

Heavier casings (like Maxxis DoubleDown or Continental ProTection) have stiffer sidewalls and can handle the same pressure as lighter casings without deforming as much. That said, heavier casing tires are often run at the same or slightly higher pressure to take advantage of the sidewall protection, especially in enduro and DH riding.

Question 2

What is the difference between tire brand guides and bike brand guides?

Accepted Answer

Bike brand guides (Trek, Specialized, Giant) answer: 'I have a Trek — what pressure?' They work from the bike model to the tire size to a pressure range. Tire brand guides answer: 'I have Continental GP5000s — what pressure?' They work from the specific tire construction and width, which is often more precise.

Question 3

Should I follow the tire brand's recommendation or my bike manufacturer's recommendation?

Accepted Answer

Follow the tire's recommendation as the primary guidance — the tire manufacturer knows the construction limits best. Your bike manual may list a range based on the tires originally spec'd on the bike. If you have upgraded to different tires, use the tire brand's recommendation.

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