Yeah OK I have to back track here, although saying they probably are not necessary after 3-4 hours your back & wrists do get abit sore, I rode a SV with some risers bars, was impressed, so I invested in a set of F1 Eng risers bars, I can now say they are great, well made, a bit dear, but just done to coro loop, approx 5 hrs and no real problems. I think they are a good investment. No sore back, only minus is a bit more windage , but minimal.