Amazon.com: MaxxHaul 80875 1-1/4" to 2" Hitch Adapter With 4" Rise and 3-3/8" Drop - For Class I and Class II Receivers : Automotive
2" to 1-1/4" Hitch Reducer | Discount Ramps
Not exactly bicycle repair, but would you run this? 1 1/4 to 2 inch riser and extender hitch to a Thule bike rack with a 1 1/4 to a 2 inch adapter : r/bikewrench