Why T47 and UDH show up together on modern gravel builds
T47 is a threaded bottom bracket standard with a wide shell. UDH is SRAM’s Universal Derailleur Hanger. Together they solve two different headaches: a creak-prone BB interface, and a fragile, brand-specific hanger after a crash or when you swap drivetrains.
If you are building or buying a gravel frameset and those two specs are on the sheet, you are looking at a modern parts path—press-fit drama down, hanger swaps and Transmission-ready options up. Mondince’s clear examples are the FM366 and FM376.
FM366 — aero gravel frameset with T47 BB and UDH hanger.
For the wider gravel lineup (clearance, storage, geometry), start on the carbon gravel bike frame category, then use this page for the T47 + UDH decision.
What T47 actually changes
T47 uses a large-diameter threaded shell (commonly 85.5mm wide on these Mondince gravel frames). Threaded cups are easier to service than many press-fit setups, and the wide shell helps the BB area stay stiff under gravel loads.
- Serviceable cups — less “mystery creak” hunting
- Wide shell — better support for modern crank spindles
- Clear upgrade path — stick with a known BB ecosystem instead of obscure press-fit variants
You still need the right BB for your crank (SRAM, Shimano, etc.). T47 is the frame interface; the cups and bearings follow the crank.
What UDH actually changes
FM376 — all-terrain racing gravel frameset, T47 + UDH, up to 57mm tires.
UDH standardizes the rear derailleur hanger. One hanger shape across frames means replacements are easier to find, and the interface is designed around modern SRAM mountain and gravel Transmission systems as well as conventional derailleurs that support UDH.
- One hanger standard — fewer “wrong SKU” moments
- Better crash survivability story — replace the hanger, not the dropout guesswork
- Future-friendly — ready for UDH-compatible groupsets without a frame swap
Want the hanger deep-dive only? Keep What Is a UDH Hanger as the education page. This article is about choosing a T47 + UDH gravel frameset.
FM366 and FM376: two T47 + UDH paths
| Spec | FM366 | FM376 |
|---|---|---|
| Bottom bracket | T47 85.5mm | T47 85.5mm |
| Hanger | UDH | UDH |
| Tire clearance (listed) | Up to 57mm aero gravel | Up to 57mm all-terrain |
| Role | Aero / fast mixed gravel | All-terrain racing / rough volume |
Confirm live specs on each product page before you order. Tire clearance and packaging can vary by batch.
Choose FM366 when you want T47 + UDH on a faster aero gravel platform with big clearance.
Choose FM376 when the same standards matter, but the ride priority is all-terrain stability and volume—see also the 57mm tire clearance guide.
Also have T47 + UDH but already covered under storage? That is FM336 — use the downtube storage guide for that intent, not this page.
Who should care about T47 + UDH
- You are building a new gravel bike and want serviceable BB + modern hanger in one decision
- You ride rough mixed surfaces and do not want press-fit creak as a hobby
- You may run SRAM Transmission or want a UDH-ready path later
- You already decided clearance (47 / 50 / 57) and now want standards that match a long parts life
FAQ
What is a T47 UDH gravel frameset?
A gravel frameset that uses a T47 threaded bottom bracket and a Universal Derailleur Hanger. On Mondince, FM366 and FM376 are the straightforward examples for that combo with large tire clearance.
Do I need SRAM to use UDH?
No. UDH is the hanger standard. Many derailleurs work with UDH frames; SRAM Transmission is one reason riders seek it, not the only one.
Is T47 the same as BB86 or BSA?
No. T47 is its own threaded, large-diameter standard. Do not mix cups. Match the BB kit to both the frame (T47) and your crank.
FM366 or FM376 if I already want 57mm?
Both list large clearance. Pick FM366 for the aero / faster gravel character; FM376 when all-terrain volume and stability lead. Standards (T47 + UDH) are shared.
Where do I compare the rest of the gravel range?
Use the category page for the full lineup. This article only ranks the T47 + UDH choice.
Bottom line
For a T47 and UDH gravel frameset, start with FM366 or FM376. Same modern standards, different ride jobs. Then confirm clearance and size on the product page—or ask via Contact.
