http://www.dotbike.com/ProductsP3109.aspx?A=3 "inserts" what do they 'insert' into? Do you need a holder, if so where do you get it, and will it fit my brake calipers. My current brakes are what i think are called 'dual pull', i call them 'caliper brakes', anyhow they're just the standard type of shimano brakes you find on most road bikes, i.e. not V-brakes. Can't use V-brake blocks as although they would fit on the brake caliper itself they are too long for how close the calipers are to the seatstay/forks. The brake blocks i've currently got have just got a bolt that comes off goes through a gap in the caliper back into the back of the block to hold it on. Current brakes' performance isn't desparately bad or anything, but wouldn't say no to it being slightly sharper. Also was wondering is koolstap salmon more powerful in the dry aswell as the wet (i notice they're listed as for wet weather), and is there any merit in having koolstop salmon on the front and normal ones on the back to stop me fishtailing when braking from high speed - there's a hill i come down on the way home that's quite steep and can bat down it at a fair old crack (e.g. 40) but there's some evil traffic lights a third of the way down and some more near the bottom... i've noticed this can cause my rear end to wander a little bit.