8000 jockey wheels on 6800

[guru]

Has anyone tried replacing the jockeys wheels gon a 6800 Ultegra rear derailleur with Ultegra 8000 jockey wheels ? Mine are shot and the 8000 seems to be an improvement

[oldpotatoe]

Has anyone tried replacing the jockeys wheels gon a 6800 Ultegra rear derailleur with Ultegra 8000 jockey wheels ? Mine are shot and the 8000 seems to be an improvement

The top pulley teeth on the 8000 are quite a bit 'taller' than the 6800 top pulley..I wonder if it'll clear the 6800 rear der cage.
Might look at these..Tacx..wee cart bearings.

This says for 6800 and 8000, longer teeth, so maybe they are..shimano

https://www.amazon.com/SHIMANO-Ultegra-Speed-Pulley-RD-6800/dp/B01LXPO7TA/ref=sr_1_9?dchild=1&keywords=tacx+jockey+wheels+shimano+11s&qid=1601206483&s=sporting-goods&sr=1-9