Cyclists with active dogs get a sturdier ride here. This trailer-only cart supports dogs up to 100 lbs inside a 31.9 by 21.9 by 25.2 in cabin with extra headroom over the 88 lb model. The carbon steel and 600D Oxford build absorbs vibration on packed gravel and sealed asphalt while a universal coupler clamps to most 22 to 28 in wheel bikes. Quick-release wheels pop off for trunk packing and the frame folds flat to a 31.2 by 24 by 8.1 in package.