madkate: a question or two.
Like is this a new or 'used' bike, then to have the tyres on this bike been with chicken stripes for some time, lasty what make & type of tyres?
Chris has a good point about tyre pressure.
REMEMBER when you are trying to stay on the "edge of no return" you are probably riding at 110% of your ability & that is only done when in comp.
On the road it should be around 60% of you ability for last 40% is left for safe riding & in case you are forced into trying to avoid an accident caused by someone or something else.
Lastly two prangs does sort of take the whiz out of one for a while.
For your interest some NEVER push the bike to where they are at that "edge of no return" or dragging their footrests let alone the extreme of the knee.