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SRAM DUB bottom brackets, sorted by shell

I sort the bottom bracket drawer on slow afternoons, so I know which box is which.

Five SRAM DUB bottom brackets live in the drawer. From the crank side they are interchangeable: each one hands the crank the same DUB spindle interface. From the frame side they are not interchangeable at all. Picking the right box is a question about your frame shell, and nothing else.

That is the whole shape of this category. One provided standard, five required ones. So the useful way to read the drawer is as a list of shells, and the useful way to shop it is to know your shell first. If you do not know it, we would rather you ask than guess, because a pressed cup in the wrong bore is a frame repair, not a return.

The threaded pair

Two of the five thread into the frame. They are the easiest to service at home and the easiest to identify: if you can see threads in the shell, you are in this half of the drawer. The narrower one covers the common road, gravel and trail widths. The wider one exists for downhill frames with a broad shell and a broad chainline.

SRAM DUB BSA bottom bracket, 68/73 mm

Requires — Bottom bracket shellBSA / English threaded, 68 mm or BSA / English threaded, 73 mm
Provides — Crank spindleSRAM DUB (28.99 mm)
Manufacturer part numberBB-DUB-BSA-A1 68/73
BrandSRAM

SRAM DUB BSA bottom bracket, 83 mm (DH)

Requires — Bottom bracket shellBSA / English threaded, 83 mm
Provides — Crank spindleSRAM DUB (28.99 mm)
Manufacturer part numberBB-DUB-BSA-A1 83
BrandSRAM

Note what the two rows do not say. Neither requirement mentions a bore diameter, because a threaded shell is defined by its thread and its width. That is why the threaded half of this category is short: two widths, two boxes, done.

The pressed three

The other three press into a bare shell, and here both the bore and the width matter. Read the requirement rows side by side and the family tree is obvious: a narrow bore group, a wide bore group, and an oversized bearing group that swallows the bearings inside the frame itself.

SRAM DUB PressFit bottom bracket, PF86.5/89.5/92

Requires — Bottom bracket shellPress-fit BB86 (41 mm bore, 86.5 mm) or Press-fit BB92 (41 mm bore, 91.5 mm)
Provides — Crank spindleSRAM DUB (28.99 mm)
Manufacturer part numberBB-DUB-PF-A1 86/92
BrandSRAM

SRAM DUB PressFit30 bottom bracket

Requires — Bottom bracket shellPress-fit PF30 (46 mm bore, 68 mm) or Press-fit PF30, 73 mm or BB386EVO (46 mm bore, 86.5 mm) or BBright (Cervélo, 46 mm bore, 79 mm)
Provides — Crank spindleSRAM DUB (28.99 mm)
Manufacturer part numberBB-DUB-PF30-A1
BrandSRAM

SRAM DUB BB30 bottom bracket

Requires — Bottom bracket shellBB30 (42 mm bore, 68 mm) or BB30, 73 mm or BBright (Cervélo, 46 mm bore, 79 mm)
Provides — Crank spindleSRAM DUB (28.99 mm)
Manufacturer part numberBB-DUB-BB30-A1
BrandSRAM

One provided standard, five required ones. The frame decides.

What this looks like against a real bike

Canyon Grail CF SL 7 (2025)

Bottom bracket shellPress-fit BB86 (41 mm bore, 86.5 mm)
Crank spindleShimano Hollowtech II, 24 mm
Disciplinegravel
BrandCanyon

Run the drawer against that shell and only one box survives. The SRAM DUB PressFit bottom bracket, PF86.5/89.5/92 fits the Canyon Grail CF SL 7 (2025), because the required shell matches the shell on file. The SRAM DUB BB30 bottom bracket does not fit the Canyon Grail CF SL 7 (2025); neither does the SRAM DUB PressFit30 bottom bracket, the SRAM DUB BSA bottom bracket, 68/73 mm, or the SRAM DUB BSA bottom bracket, 83 mm (DH). In every one of those four cases the reason is the same: the shell does not match.

All five of those verdicts are derived, meaning one cited source states the facts behind them. No bike in our fleet is fully verified yet, and we say so rather than dress it up. Note also what the bike's own crank spindle row says: this frame is on file with a Shimano interface, not a DUB one. A DUB bottom bracket is a match for the shell, and it presumes you are fitting a DUB crank on top of it.

How to choose without guessing

Three checks, in order

  1. Threaded or pressed? Look into the shell with the cranks out. Visible threads send you to the BSA pair. A smooth bore sends you to the pressed three.
  2. Which width and bore? Read your frame maker's own sheet, not a forum. The requirement rows above are written in the same vocabulary the frame sheets use, so they compare directly.
  3. Confirm the crank side. Every box here provides the same DUB spindle interface. If your crank is not a DUB crank, the bottom bracket is not your answer, and swapping it will not make it one.

If you get to the second check and your frame's shell is simply not on file with us, the honest answer is unknown, and unknown is where we stop. A bottom bracket is a press into structural carbon or alloy. We do not sell a part into an unknown, and we do not let a page look finished when the measurement behind it is missing.

Do all five of these bottom brackets take the same crank?
They all provide the same crank spindle interface, listed as SRAM DUB (28.99 mm) on every one of the spec rows above. That is the part of the category that does not vary.
Which one fits the Canyon Grail CF SL 7 (2025)?
The SRAM DUB PressFit bottom bracket, PF86.5/89.5/92 fits, because the required shell matches the shell on file for that frame. The other four do not fit, each because of a shell mismatch.
Can I use an adapter to put a threaded bottom bracket in a pressed shell?
Not from anything in this drawer. None of these five is listed as fitting through an adapter, so we will not imply one. If your frame needs a threaded conversion, that is a different product and a different conversation.
Why does one box list several shell standards?
Because some shells share a bore and differ only in width, so a single cup set covers them. Read the whole requirement row: if your shell is not named in it, that box is not your box.

The short version

  • All five DUB bottom brackets provide the same crank spindle interface; only the required frame shell separates them.
  • Two thread in, three press in. Look into the shell before you shop.
  • Against the Canyon Grail CF SL 7 (2025), only the SRAM DUB PressFit bottom bracket, PF86.5/89.5/92 fits; the other four do not.
  • Every verdict here is derived from one cited source. No bike in the fleet is fully verified yet.
  • If your shell is not on file, the answer is unknown, and we will not sell into it.

More in the Journal

  • What We Still Don't Know About the Grail CF SL 7

    The Canyon Grail CF SL 7 (2025) sits in our fleet with one source behind each fact and no second publisher agreeing yet. Here is what that means, which answers still stand, which ones wait, and what would change them.

  • The Cassette Shelf, Counted Cog by Cog

    Five cassettes are on file in the archive: one nine-speed microSHIFT, one twelve-speed Shimano, and three SRAM eleven-speed options. This guide lays out the three numbers that separate them — freehub body, rear speeds, and the smallest rear derailleur capacity they demand — and says plainly which bike in the fleet they do and do not fit.

  • Why your 11-speed chain fits — and the 12-speed one does not

    Chain compatibility comes down to one standard most boxes print as a speed count: the chain width. Here it is for the two KMC chains people ask about most, and what it means on an 11-speed and on a 12-speed bike from the fleet.

  • The Giant Escape 3, As Far As Our Paper Goes

    A plain accounting of the Giant Escape 3 (2024): the measurements we have on file, the ones we do not, the three regions worth reading before you buy, and four listed parts with their projected verdicts.

  • Rear Wheel of the Giant Fathom 29 2: What Bolts On

    A region guide to the rear wheel of the Giant Fathom 29 2 (2022): the cited frame and wheel facts we hold, the two Maxxis parts projected to fit, why each verdict lands where it does, and the measurements that are still missing from the file.

  • The Glory Advanced Is on File, Not Yet Verified

    Every fact we hold on the Giant Glory Advanced (2025) comes from a single cited source. That is enough to answer some questions and not enough to answer others. Here is exactly which is which, and what would move a line from unknown to answered.

  • Setting Up a Rear Derailleur on the Bench at Home

    A plain bench procedure for hanging, limiting, indexing and clutch-checking a rear derailleur at home, plus the three rear derailleurs the shop lists and how they read against the Canyon Grail CF SL 7 (2025).

  • Swapping a Cassette at Home, Without Guesswork

    A bench procedure for removing and installing a rear cassette, the spec rows that decide which cassette you can even buy, and the three cassette pages the shop lists — including why all three are projected not to fit the Canyon Grail CF SL 7 (2025).

  • The e12 chain and the Grail: a clean match on the drivetrain

    The KMC e12 e-bike chain, 12-speed fits the Canyon Grail CF SL 7 (2025). The chain standard on the bike's sheet matches the chain standard the part requires. Here is the reasoning, the rows behind it, and what happens when you bring an older chain to the same drivetrain.

  • The KMC X10, and the one thing it asks of your bike

    The KMC X10 chain, 10-speed has a single requirement: a 10-speed drivetrain. We read the spec rows, then check it against the two bikes on file with the same chain standard — the Giant Fathom 29 2 (2022) and the Kona Sutra (2025). Both come back as fits, on derived facts.

  • The X9 and the Roam: one chain, one answer

    The KMC X9 chain, 9-speed fits the Giant Roam 2 Disc (2021). The chain standard on the bike matches the chain standard the part asks for, and both facts are on file. Here is the reasoning, the spec rows behind it, and the chain that does not fit.

  • Rotor size is a safety question, not a taste

    A bigger rotor brakes harder. It also loads the fork mount beyond what it was tested for when it exceeds the fork maximum. Here is why a rotor reads "unknown" on a single-sourced bike, "does not fit" when the interface is wrong, and "unknown — safety-critical" when the maximum is not on file.

  • The 1.85 mm spacer: the cassette that confuses everyone

    An 8/9/10-speed cassette on an 11-speed road freehub: why there is a gap, why a 1.85 mm ring fills it, how the resolver treats that ring — and why the page can still say "unknown" after the freehub question is settled.

  • DUB: One Spindle, Four Shells

    SRAM DUB is a crank spindle standard measured at 28.99 mm. Here is what that number does mechanically, which bottom brackets in our archive carry it, and why the shell in your frame — not the spindle — decides what you can buy.

  • What "unknown" means in this shop

    A bike we have not verified stays on the floor with a sign on it, not in the back room. Here is what that sign says, with the Brompton C Line as the live example, and why we would rather lose the sale than guess.

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