Question:
which bolt on spare mount product offered would be best suited for oversized spare application
asked by: Sam D
Expert Reply:
The Yakima SpareRide you referenced will fit spare tires up to P285 or 12-1/2 inches in width. The SpareRide offers the best chance of fitting your tire. This rack will not fit a spare tire mount with an 8-hole bolt pattern or hole-pattern diameter greater than 5-1/2.
For womens bikes or bikes with sharply angled top tubes or step-through frames, using a frame adapter like part # Y02531 is recommended. The adapter spans the distance between the seat post and the handle bar gooseneck, and provides a level attachment point to the bike rack so the bike has greater ground clearance and is not carried at an angle.
I have linked you to an FAQ article that shows how to determine the bolt pattern of your spare tire, if needed.
There are also links to the install details for you to check out.
Yakima Tube Top Bike Adapter Bar
Yakima SpareRide 2 Bike Rack - Spare Tire Mount - Folding Arms