Explanation[]
Speed is proportionate to the level of Spiral Power a Spiral being has. This is proven in Episode 3, where Kamina in Gurren was incapable of landing any hits on Viral's Enki, but after combining with Simon's Lagann (thereby, combining their Spiral Power), he is suddenly able to land multiple hits on Enki.
After Simon gained an 11-D physiology after physically integrating the multiverse to his body, he should be capable of moving freely through the 11th dimension, which is the time dimension of Gurren Lagann, therefore Simon has Immeasurable speed, and it only gets faster after here with the use of our good pal, the Power of the Spiral.
Scaling Chain[]
Simon was implied to have Spiral Power, which flows throughout Tengen Toppa Gurren Lagann, so at the beginning of this scaling chain is Simon at Infinity x Immeasurable
The multipliers shown in this scaling chain mirror the one's of the Attack Potency scaling chain
Infinite times Immeasurable[]
Simon (Post-Multiverse Labyrinth), Team Dai-Gurren (Post-Multiverse Labyrinth), Tengen Toppa Gurren Lagann and Gurren Lagann (Post-Multiverse Labyrinth),
2 times Infinite times Immeasurable[]
Lordgenome (Post-Infinity Big Bang Storm)
3 times Infinite times Immeasurable[]
Tengen Toppa Gurren Lagann (Post-Infinity Big Bang Storm)
60 times Infinite times Immeasurable[]
Super Tengen Toppa Gurren Lagann
960 times Infinite times Immeasurable[]
Gurren Lagann (Peak), Viral (Peak), Boota (Peak), Nia Teppelin (Peak) and Antispiral
1,920 times Infinite times Immeasurable[]
Simon (Peak)