tyre pressure depends on weight of rider... i'm like 15st so i put 30 in my rear and 40 in my front.... i run fixxed rear and tensile front, i had the same personal debate... but after a convo with hdmackay (in inverness when i was in scotland) i decided to go fixxed rear and free front probably doesnt help but it was my "2 pence"
mat in all fairness i know a guy who went form 14mm to 20mm in one hit! it all depends on the persons pain theshold and also how stretchy the ear flesh is... to the guy who recently got his ear pierced.... wait till your current piercing is healed befor you stretch it... its a hassle for waiting but it will be worth it. x
i went from 1.6mm to 10mm in 6 weeks .... theoretically speaking up to 10mm if you take it out then it will heal back to a normal piercing, anything over 15mm wont heal that well at all...