hi, i have recently been scarred for life by one of these things because of the tension on the chain-tugs kept moving and the bike getting puctures every 5 minutes, (literally). So it was back to mod for me as this thing nearly made me give trials up altogether. On the upside the bike weighs as light as a feather even though everyone on here says there heavy? If you go ahead with this build i reccomend you get yourself a really strong rim like the ones danny mac uses i forgot what there called. The reason is because the wheelbuilds are a bit weaker due to being 116mm spacing as opposed to 135mm. I used a Try-all 47mm (made of cheddar cheese) and i buckled it the first ride which was the last straw before i went back to 20". Also the the chain-tugs kept moving but i'm sure something must of been damaged of mine because lots of riders ride modstock with chain-tugs and have no problems. The bike rides truly awsome though i used this stem Tartybikes Stem