Well, I thought I’d follow up my questions in the other thread with some science facts, since I have now done the Strathpuffer.
Where we left off:
Ok, so I rode 14 laps this time round (2014 Strathpuffer). Not fast, nor a big number of laps, a bit below average. But I didn’t hold back on the downs nor on the brakes.
I had 6 complete sets (12 pairs) of pads with me. I had bedded in a new set and was running those. I had another bedded in set ready to go, and I also had two new sets (unbedded in), and old set (nearly done) – these are all original Hope sintered pads. I also had a set of new organic Hope pads.
As it turned out, I didn’t need to change pads for my 14 laps. I was washing the transmission and brakes every 4 laps.It was muddy, and the bike was covered in the gritty Strathpeffer / Contin / Strathpuffer mud.
I have just taken a set of calipers, and measured the pad depth in the various pads. Here are the results:
0.169″ Brand new pads
0.1655″ bedded in rear
0.164″ bedded in front
0.1635″ puffer 14 laps rear
0.163″ puffer 14 laps front
0.113″ old pads, nearly done
0.081″ backing plate thickness
Worst case wear = 0.002″ for 14 laps
Bedded in pads have about 0.064″ pad depth
Therefore, if using till 0.1″, pads have enough ‘meat’ for 448 laps of Strathpuffer course = 3046 miles.
The conclusion is there is something else going on when we hear reports of pads getting eaten in a few laps. Certainly, if you turn up with pads on their last legs, then wear them through to the backing, that will mess up your rotors and that will munch pads.
Maybe using organic pads will see them worn away as well, I don’t know, we’d have to experiment with that.
Maybe not cleaning the brakes every few laps would start to wear them faster, but to be honest I don’t believe that is a big factor – the bike was covered in mud long before any of the downhill sections, every lap.
IMHO, if you start with new sintered pads, and your breaks are in good working order, you will be fine in this race on one set of pads, easily.
p.s. bedding in is another thing that I feel may be a myth, but I need to conduct a similar test with the bedded in pads vs the brand new pads.