It has a silver-gray high density polyethylene shell, two locking latches, heavy duty recessed ball bearing wheels and a flip out handle for easy pulling or pushing. For maximum protection we recommend that up to 4 compression members be used with this case. These cases are oversize and do not meet airline size requirements. They may accommodate tandems that won't fit in our standard single bike case. We have sold lots of these cases and I haven't heard of anyone getting charged due to their extra size.
Wheels make rolling through the airport a breeze.
For the best stability, push the case rather than pulling it on uneven surfaces. All of our cases are even small enough to fit in the front seat of a compact truck. S and S suitcase and Bob trailer combination.