Rear gear spacers?

[capriceowns]

I was browsing on summit yesterday, and theres this spacers for rear gears, idk what they do.

Would that spacer allow me to use a series 3 gear in my series 2? or are they made for something completely different...

link: http://store.summitracing.com/egnsea...115+4294875281

[maxwedge]

These allow for the use of say 4.10 ring and pinion on a carrier that was only designed for gears, say up to 3.73 or so.