Shimano XT BR-M8110 (flat mount, rear) Front Brake
What the checker says497will not fit
Run variant by variant through the mountain bike builder’s own engine. Every sentence below is the checker’s, unedited. Nothing here says this part fits your bike; it says what it does and does not fit among the parts we hold.
Checked against 6082 verified mountain bike parts in this catalog. 6075 produced no finding of any kind; that is Deore XT BR-M8100 (2-piston). XT BR-M8110 (flat mount, rear) clears 5514. Each variant produces 7 to 497 distinct errors and 0 distinct warnings.
Will not fit
- Will not fiterror · Front RotorFront rotor too big for the caliper as recorded here: 203mm is larger than 180mm, the largest rotor size this catalog records for the Shimano XT BR-M8110 (flat mount, rear) caliper. The caliper maker's own rotor chart is the place to check. The flat-mount system has no size-up bracket, so no adapter can step it up. On 40 of the 177 verified rotors in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · Front RotorFront rotor too big for the caliper as recorded here: 220mm is larger than 180mm, the largest rotor size this catalog records for the Shimano XT BR-M8110 (flat mount, rear) caliper. The caliper maker's own rotor chart is the place to check. The flat-mount system has no size-up bracket, so no adapter can step it up. On 15 of the 177 verified rotors in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · Front RotorFront rotor too big for the caliper as recorded here: 200mm is larger than 180mm, the largest rotor size this catalog records for the Shimano XT BR-M8110 (flat mount, rear) caliper. The caliper maker's own rotor chart is the place to check. The flat-mount system has no size-up bracket, so no adapter can step it up. On 11 of the 177 verified rotors in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · Front RotorFront rotor too big for the caliper as recorded here: 223mm is larger than 180mm, the largest rotor size this catalog records for the Shimano XT BR-M8110 (flat mount, rear) caliper. The caliper maker's own rotor chart is the place to check. The flat-mount system has no size-up bracket, so no adapter can step it up. On 5 of the 177 verified rotors in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · ForkFront brake mount: Shimano XT BR-M8110 (flat mount, rear) is a Flat mount caliper and RockShox 35 Gold RL has a Post mount - two different mounting standards, so the caliper does not bolt on as it is. A post-mount-to-flat-mount adapter exists; it only steps the rotor size up (+20mm) and needs sufficient boss clearance. A shim or adapter may make other sizes or standards work, but that is a modification, not a fit. On 3 of the 490 verified forks in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · ForkFront brake mount: Shimano XT BR-M8110 (flat mount, rear) is a Flat mount caliper and Manitou R7 Pro 100 has a Post mount - two different mounting standards, so the caliper does not bolt on as it is. A post-mount-to-flat-mount adapter exists; it only steps the rotor size up (+20mm) and needs sufficient boss clearance. A shim or adapter may make other sizes or standards work, but that is a modification, not a fit. On 2 of the 490 verified forks in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · ForkFront brake mount: Shimano XT BR-M8110 (flat mount, rear) is a Flat mount caliper and Manitou R7 Pro 120 has a Post mount - two different mounting standards, so the caliper does not bolt on as it is. A post-mount-to-flat-mount adapter exists; it only steps the rotor size up (+20mm) and needs sufficient boss clearance. A shim or adapter may make other sizes or standards work, but that is a modification, not a fit. On 2 of the 490 verified forks in this catalog. Applies to 1 of 2 variants.
Front brake mount, Fork. 483 more findings from the same check, on up to 1 of the 490 verified forks each.
Shifter mount, Shifter. 7 more findings from the same check, on up to 1 of the 53 verified shifters each.
Open a variant in the builder to see the ones that apply to your own parts.
$140.00 to $150.00 MSRP·126 to 260 g
What the maker states
- Mount
- Flat mount caliper (on 1 of 2 variants); Post mount caliper (on 1 of 2 variants)
- Pistons
- 2-piston caliper
- Maximum rotor
- Rotor up to 180 mm (on 1 of 2 variants)
- Lever accepts
- I-Spec EV
A value shown as a set or a range differs between this model’s variants and is never one variant’s spec.
2 verified variants
| Variant | Mount | Maximum rotor | Price (MSRP) | Weight | Source | Last checked | Build |
|---|---|---|---|---|---|---|---|
| XT BR-M8110 (flat mount, rear) | Flat mount caliper | Rotor up to 180 mm | $140.00 | 126 g | maker’s page | 2026-08-15 | Build with this |
| Deore XT BR-M8100 (2-piston) | Post mount caliper | not stated | $150.00 | 260 g | maker’s page | 2026-07-10 | Build with this |
The rest of what the maker states4 not published
4 further fields the checker looks for are not published by Shimano, so we leave them blank rather than estimate them, and those 4 checks stay silent on this front brake. They are excludes rotor, maximum rotor evidence, design rotor thickness and design rotor thickness maximum. Each is recorded as “not stated by the maker (not checked)”.
Source: each variant links the maker’s own page in the table above. Last checked 2026-07-10 to 2026-08-15.
Checked against
The checker ran this model against every verified part below that it has a slot for, the same way it checks a build in the builder. What follows is the verdict it actually produced for that specific pairing — not a recommendation, and not a guarantee any of these parts fits your own bike.
- 5DEV R-SPEC Trail/Enduro Cranks (Crankset) No conflicts found
- 9point8 Fall Line (Dropper Post) No conflicts found
- 9point8 Stout (31.8, 30mm) (Stem) No conflicts found
- ACID SLX 30 front (Front Wheel) No conflicts found
- ACID SLX 30 rear (Rear Wheel) No conflicts found
- Acros ZS44/ZS56 (Headset) No conflicts found
6 of 1862 counterparts with a page of their own that the checker actually probed this model against, in alphabetical order by brand and model — never by price, popularity or the verdict itself.