I ditched the Bontrager handlebars & stem combo altogether - the handlebars were too wide (I replaced them with a carbon fiber bar I had on hand) and the stem was too long (again, I replaced with one I had on hand that was 30 mm shorter). I also used a pair of ESI Chunkies I had laying around for grips, much better than the gel grips that came on the bike. I wasn't impressed with the cockpit of my FX 4 but with the changes I've made, everything is much more comfortable for the long haul. I've also replaced the seat and seatpost for better comfort, too; in all, I replaced the top end of the bike due to poor component spec by Trek - it might be good enough for a few people, but I've been riding a long time and can tell it probably isn't so great for the masses but that's what Trek sells.