305mm vs 350mm rear brake rotors

[Nikw91]

Is it worth the upgrade to go to 350mm rear rotors if i do about 5-6 track days a year?

Ive been looking at the DBA 4000 rotors for the rear for around $340 and the Paragon 350mm rear rotor upgrade is $850. Is it worth the extra $500 for the bigger rotor?

I just always see the front rotors glowing on FL5s and never the rears.

Already running:
- Paragon slotted front rotors,
- Paragon P3 pads front and rear,
- Goodridge stainless steel brake lines,
- Endless RF650 brake fluid,
- Wunderladen rear brake bushings.

Thank you!

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[J_D]

I vote el cheapo $30 blanks

 

[Websitesdown]

I upgraded my rears to the Paragon, no complaints.

 

[CG13]

I’m running OEM rotors and calipers on the rear with Ferodo DS1.11 pads. I run 372mm AP Racing front rotors and Radical calipers with the same pads.

I run with pedal dance and have very little wear on the rear pads over time. I changed rear pads once in two track seasons.

At this point I’ve seen no reason to upgrade.

 

[Unity Performance]

I've had my Paragon Rear 350mm kit since 2022, originally on my FK8, and the rotor rings still have plenty of life left after roughly 25k of use with P3 pads. We moved the kit over to the FL5 two months ago and are currently reusing the OEM pads, since I gave the P3 pads to a friend, they still had another season of use left in them.

The larger surface area disperses heat quickly, so the typical rear brake pad wear concern isn't really an issue with this setup.

 

[Adam123]

From my experience which is also about 5-6 track days a year, with the pedal dance and VSA disabled there is minimal wear on the rear brakes. 70-80% of braking is up front. I have also thought of upgraded the rears to the slotted paragons but after checking brake temps after each track sessions (20 mins) the temps are no where near as hot as the front and so it doesn’t really seem needed. Aesthetically 350 in the rear looks cool but I think that’s about as much as I can justify at this stage

if you want to run Hondas brake vectoring on track then 100% upgrade pads and rotors

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