I don't know wellgo pedals, so I'm guessing.
Everything I see says 98a are 51's
Even on their pedals and cleats
Wellgo website has nowt on it.
No idea what 99's are or which pedals they for. (EDIT see below)
I see some WAM-M19 at on of the shops and they look pretty much the same as my PowerPlay pedals, they use Shimano cleats. (they are no quite the same though)
Is the 99 just the multi release version of the 98a so the SH56's ? which is just a slightly worn out SH51 ?
And compatible with each other.
(EDIT see below, they're not)
ooh
The Wellgo 99A Replacement Cleats are for Wellgo WAM-M3 pedals only. Features 4 degrees of float
The pictures of the 99a look substantially different than the SH51/56 and 98a
The pedals get slammed here
http://www.mtbr.com/cat/drivetrain/Peda ... 35crx.aspx
and yes the reports of not working.... so I would guess it may work but not as you would like.
99 are not the same as 98 so anyone reporting on using 98 is not reporting on the 99 compatibility.
Well, hope that muddles the water some more
99a
http://www.pricepoint.com/detail/14776- ... Cleats.htm