After my 3rd flat rear tire in 8500 kms on a new CRF I will opt for the Outex kit first. If that turns out to be a dissapointment I`ll give Alpina a ring. I need the bike every day for my job as an instructor. My last flat tire was sunday and we were not able to repair it. No spare inner tubes around at the moment. I love this bike to bits, really, but I want to go back to the time when I only had to plug a flat.... and I want this bike too. It`s been a long while since I enjoyed riding a bike this much...