I do not see a 64P 70T spur gear for sale there ... am I blind?

Here are some and it seems Xenon Racing is the best bet. There is one source overseas and one older RW racing gear.
https://www.tqrcracing.com/shop/prod...asp?p_id=13851

https://www.michaelsrchobbies.com/xe...r-64p-70t.html

64P Spur Gear , 70T #RO-SG6470 - Race Opt - Spur Gear

https://www.ebay.com/itm/G64-3070-EX...EAAOSwkktc6IpW

Xenon Racing - Ultimate Machine cut spur gear 64P 70T

https://www.apexrc.com/products/rw-r...diff-spur-gear

The Xenon Racing gear looks perfect without that outside lip, thanks!

You're welcome.No problem, If they work well you may want to order an extra. You may want to consider other sizes that are more available.

I like the performance I'm getting out of the 64P 53T pinion / 70T spur combo, but I am open to other suggestions as well.

If you can get to the same FDR with a different gearing combo with a more common spur it might be good or just stay with it. Just buy an extra gear or two.

Why?

Built this kit last year for fun. Now set up for rear wheel drive only. 19-turn brushed motor. 40mm cooling fan wired to a small voltage regulator to set desired fan speed. Chassis cutout made under motor for additional air flow. Stock kit TBLE-02S speed control with 3.5mm banana plugs for motor connection and TRX plug for battery.

Some of the optional, non-kit parts to finish the build are: ball bearings, Yeah Racing 55mm oil filled shocks, aluminum motor mount, Robinson Racing 24T mod .6 steel pinion gear, metal suspension balls for front steering knuckles, Tamiya hard tire sponge/insert, lightweight M4 wheel lock nuts. Most screws used are M3 socket hex variety.

Differentials were built with steel M2 flat head socket hex machine screws with low profile aluminum washers. Longer than the stock kit self tapping screws, going deeper into the diff case to make for a more rigid, stronger diff assembly. Diff internal is filled with sticky Tamiya anti-wear grease. 0.2mm thick 8mm shim installed for better diff gear mesh.

I have to use stock brushed motor for racing. New motor make the car fast but falls off within a few races. Will braking in a motor make a difference? What is the best way to do that if it will?

The blue decks have been out of stock since... at least thanksgiving. So a year now. *shakes head* I'm not pleased.

Say WHAAAAAAT! Where'd you get your info???

The important thing about the new hard deck is that it is actually a proper hop-up with the 54*** prefix. So these should be plentiful.. and importantly, they are also going to look better.

I like the blue. (and white, as the case may be.)