Tire, 5" 8-Ply 11.40 X
5
Replacement nose tires used on
the Lancair 235, 320/360 & the Legacy 2000 plane. The 5" 8-ply is standard.
QTY EA @ $16.00
>>>>>>>>>
Except these are the MAIN tires on the 235/320/360 also.
Wee things that they are, I set my mains to 42 psi and the nose to 32 psi while
the tire is rated for 70 psi. These are the famous "CHIN" tires -
clearly marked "Not for Highway Use" - meaning we cannot land on roads although
a 60 to 70 Kt touchdown on a rotten runway is no problem (NP for short).
I believe the proper pressure could be calculated - how many
square inches of tire support the weight - let's say at some
gross weight my nose wheel is supporting 480 pounds. At 30 psi there
is probably 16 sq in of tire (4 x 4) sitting on the ground.
All I look for over time is even wear of the tire although I
expect more wear towards the center because of the spin up at landing (at least
one squeak, but less than three on the mains means NP). The Chin tires are
NP, but the tubes can be -- if not enough talc and air pressure are used,
tire sidewall flex can wear the side of the tube to the point that AIR can leak
out resulting in a FLAT, nose wheel shimmy notwithstanding.
Luckily, you ES types get to use larger, more expensive
(more than $16) certified tires, guaranteed to keep you rolling regardless
of runway, grass or highway. Oh, that's right, you don't have to stick
those large wheels inside of a thin performance wing, NP.
Anybody filling their tubes with Nitrogen? If not, why
not?
Scott Krueger AKA Grayhawk
Lancair N92EX IO320 SB
89/96
Aurora, IL (KARR)