Bührer 6135 Tractospeed 15/3 The 6135 was the top model of the last Bührer years and became until the end of production in 1978 in one Number of 8 built as an all-wheel drive version. - Trelleborg, Continental, BKT and Michelin tires - Weather protection cover - Real engine data - Real gear ratio - Semi-industrial gearbox with vmax.35kph - Mercedes-Benz "OM 352A" engine with 135hp - Base price: 49900 $ Self-made weights available separately in the shop - 350kg weight: 650 $ - 800kg weight: 930 $