L , we have the same RT. You need to check how much air is in your rear shock !!!!.....Lift the seat , on the right side , by the passenger is a Schrader valve. Check what the air pressure is.....at your weight, 35 lbs riding single should be fine.....It will take up to 80lbs. ,,,but be careful about putting air in from a commercial source. The air bag isn't super strong and I don't believe it can take much ...OVER-PRESSURE ...without bursting, so a small 12 volt or even a bicycle pump would be advised !!!........Also if you have NO AIR, it could be like mine was ,,,it had a leak, and needed to re-placed under warranty.....good luck.....Mike ...............PM sent :thumbup: