Got my federal tax return ...not sure If I should spend all of it on 40 trepadors and 17 wheels to go with them or just do a set of 42 sx and groove/sipe them ...treps plus new 17s will cost me $4000---ish 42 sx will only be about $2000 -ish since they can go right on my current 15s . I guess I'm just not 100% sold on the Sticky treps being so much better they will justify cposting nearly double the 42s sx ,which I know for certain grooved and siped tsl work well and will do better than the boggers plus they will offer more diff clearance than the smaller 40 treps ,and it don't matter what compound the tread is if your diff is hanging , so I can see possibly the treps vs the 42sx being a tie on performace , but not price ...choices choices choices...and tsl sx look much meaner than little 40 treps ...lol.