Ryobi table saw

[greengrass]

A few months ago I bought a new universal blade and started to do many cuts . This week took the blade guard off to fit the sled I made made a few cuts and switched it off.

As the blade slowed down I notoce the appeared to be slightly buckled how could this happen when all cuts have been steady without using any force.

Is it dangerous to use this blade it cuts ok it's just the wobble worries me. Blade wasnt loose which is obvious as it would just stop spinning, it was a bugger to undo the blade nut. The drive shaft seems ok. Any ideas.
Many thanks in ancipation.

SORTED IT WAS THE BLADE.