For people in the USA or Canada the rib grip hand rims are amazingly comfortable to the hands and move you forward with less effort. MUCH less effort. I have had mine now for 2 years though be warned, the ribs start to wear off after about 2 years and do not take kindly to being washed, though they always appear clean. Likely one can spray them with clear water. I am a quad and while my own hands are adequate for normal hand rims, I have found these to be a wonder.
They currently have a sale on R & D black rib grips that may have small cosmetic blemishes. The different is $99 instead of $260.
The checkout pages show one can order from anywhere though obviously the shipping costs go up outside the US.
I step in the water, but the water has moved on...