after about two months of trying to find a new shoe, i finally tried the SLX and am kicking myself for not doing so sooner. what kept me away was the three strap design instead of a two strap tri specific closure. first, a few thoughts on the two pair i tried that didn’t work:
-Pearl Izumi Tri Fly Octane - i really wanted to like this shoe. sizing was a bit hard to dial in, but i finally settled on a 44 (i wear a 10.5 Nike, 11 in a Pearl Izumi). while this was a bit snug in the toe with a thin sock, the 44.5 seemed too big. the shoe is silly light, looks fantastic, and fits like a dream. unfortunately, after a month of trying, i could never get my cleats dialed in. i always felt like my left foot was leaning outward while pedaling (think little toe below big toe). i purchased the 1:1 fit insole system, but still had no luck getting things to feel right. i’m 99% sure this problem was with my foot / leg angle, and i admit i’m not well versed in correct foot angle / shimming cleats - i’ve always just gone off what feels right. so after selling the size 45s already, i’ll likely be selling the 44.5s shortly. huge frowny face as this would have been the perfect shoe - comfy, light, super easy to enter / exit, and killer looks.
-Bontrager RXL Hilo - like the PI, this was a very comfy shoe. it was a little roomier in the toe box, but fit well overall. unfortunately, the closure didn’t seem to be secure enough to hold my heel in place. further, the cutout around the heel bone wasn’t deep enough, and i found it rubbing after about 5 minutes use. still, a very nice shoe that was rather light. it also appeared to be very well made.
about two weeks ago, the Giro rep stopped into the shop. i asked him about their tri shoe, but he recommended SLX after i told him about the issues i was having with the PI shoes. man was he right. after a 2 minute install of the cleats, i haven’t had to adjust them once and everything feels right as rain. while the uppers were a bit stiff at first, a week and a half on the trainer has them feeling very comfortable with zero hot spots. i am using the supernatural insert, and while my arches are pretty normal, it does give a nice snug fit underfoot. it is a little narrower than my old specialized shoes, but certainly not too narrow for my slightly wide foot. the straps are more than adequate for securing the foot, and the only criticism i have is the fact you need to completely remove the top strap from the metal loop to put the shoe on. i know the Raelert Brothers race in this shoe, and see they have sewn a longer piece of strap onto their shoes to remedy this. i’ll likely do the same to make on the fly mounts smoother.
other than that, the shoes are great. despite their low weight, they offer a very supportive fit throughout. there is no lateral flex while pedaling under load - something i felt in rear half of a few tri specific shoes i tried last year. i’ll likely post back once i have more miles on them, but for now, i couldn’t be happier.