Can anybody recommend a wheel builder? I have 2 years on my 29er mtn bike and my rear wheel is toast. I really don't ride trails just on the road and bike paths. I started out at 306 lbs and am down to 265 and ride about 150 miles per week. My spokes will no longer hold their tension for a 30 mile ride. I had a LBS re-lace the wheel with new spokes about 300 miles ago.