Rear brake discs — type, thickness, Mazda cross-compat

Tags: #brake-disc · #rear-axle · #mazda-6-compat

Disc type and thickness vs front

Rear discs on the X80 are solid (not ventilated), and roughly half the thickness of the front discs. Front discs are single solid rotors of uniform thickness. Some aftermarket listing photos make the rear disc look like a two-part/floating construction because of a visible ridge, but it is a single solid disc — the ridge is just a visual artifact, confirmed by comparison photos and the owner's manual thickness diagram.¹²³⁴

Because the rear disc is thinner and rear pads/discs see roughly half the wear of the front in aggressive urban driving (see the wear-rate card for detail), this is consistent with what owners report for typical service intervals.⁵

Mazda cross-compatibility

Rear discs sourced from Mazda 6 (GH generation, 2003–2007) are usable and available for purchase on Ozon. Front discs are reported as noticeably harder to source than rear discs; rear discs are more readily available on the aftermarket. Exact fitment should still be verified against the specific Mazda model year before buying.⁶⁷⁸⁹¹⁰

Disc material composition

One owner's understanding, confirmed by another member: front discs are cast iron (чугун), while rear discs appear to be steel — described as standard configuration for this vehicle class rather than something unusual.¹¹¹²

BN-1651 part number, Lynx brand, and Mazda GH cross-compat (2025)

• BN-1651 is the widely-cited rear disc part number, sold under the Lynx brand alongside the front BN-1655 — confirmed as a perfect-fit full front+rear disc replacement set.^13141516
• Lynx BN-1651 rear disc pricing: 2,466 RUB (Ozon, RU market, Sept 2025). Available from Ozon, Wildberries ("Valeries"), and other marketplaces; the community reports better pricing found on Wildberries via seller "apstore".^17181920
• Mazda 6 GH (note: GH, not GG) rear discs are confirmed cross-compatible with X80, alongside the front BN-1655/GH cross-fit — this reconfirms and refines the Mazda cross-compat note below by specifying the GH sub-generation specifically.²¹²²²³

Ozon pair listing for Mazda 626 / 6 / MX-5 3 and NiBK RN1208DSET (Oct 2026)

An Ozon listing for a pair of rear brake discs (2 pcs) marked as fitting Mazda 626, Mazda 6, Mazda MX-5 3 and FAW Besturn X80 was posted as another cross-fit source; a second member posted an Ozon link to perforated discs, without saying which axle they are for.²⁴²⁵ One owner fitted the NiBK rear disc set RN1208DSET with pads PN5203 (the "DSET" suffix most likely means a disc set; this is inferred, not stated).²⁶ Impressions of perforated discs are in the drilled and perforated discs card.

Media

Comparison photo: solid front disc (evenly thick) vs solid rear disc (half the thickness, visible ridge that can look like two-part construction)

Related pages

• Drilled and perforated brake discs
• Front brake discs
• Rear brake pads
• Rear springs from Mazda 6 — cross-fit reports
• Brake pad wear rate — front vs rear

Sources

This page is compiled from 26 community messages. Every fact carries a numbered reference to its original author and message.

Last updated: 2026-10-29