A lightweight aluminum Manfrotto tripod (190XDB) with a 190RC2 head with a weight rating of 11 lbs. I was also using a remote to take the pics so I wasn't even touching the tripod at the time and there was no wind. Plus I waited a bit to be sure all vibration was damped. There might have been some shutter vibration because that setup is about as light as I'd want, but it was the same for all of the shots I took and the results were consistent with the pictures I posted.

The two wheel shots were both at 1/250. The F2.8 tree pic was shot at 1/6400. The F4 was 1/4000. The F8 was at 1/1250.