Want a Shimano or SRAM high direct-mount front derailleur but your frame doesn't have the mount for it? These clamp-on adapters bolt around the seat tube and give you one, in the offset your bottom bracket and rear spacing need.

Highlights

  • Clamps around the seat tube, no frame mount required
  • 34.9mm clamp with shims down to 31.8mm or 28.6mm on every version
  • Offset and hub spacing vary by version — see the table below

Compatibility & fit

Each version is built for a specific bottom bracket width, rear hub spacing and derailleur type — they are not interchangeable. Confirm your BB shell width (68/73mm, 73mm Boost, 100mm) and, on 1x drivetrains, that you actually need direct mount before ordering.

Sizes & options

Child SKUOptionFits
SCV-PSDR-FS132873mm BB Boost, 34.9/31.8/28.673mm bottom bracket with Boost rear spacing; Shimano and SRAM High Direct Mount front derailleurs; 29mm offset
SCV-PSDR-FS1327100mm BB 2x drivetrain, 34.9/31.8/28.6100mm-wide bottom brackets (2x/double cranksets); Shimano and SRAM High Direct Mount front derailleurs; 43.5mm offset
SCV-PSDR-FS1322100mm BB, 34.9/31.8/28.668/73mm or 100mm-wide bottom brackets; Shimano high direct-mount front derailleurs; AL-6061 construction
SCV-PSDR-FS1325Surly MoonlanderSurly Moonlander; Shimano and SRAM High Direct Mount front derailleurs; 55mm offset
Cover here follows Problem Solvers' standard manufacturing-defect warranty for accessories and small parts, on top of your rights under Australian Consumer Law. For warranty support, return the product to Tune Cycles and we'll manage the claim with Problem Solvers' Australian distributor.
Clamps around the seat tube — no factory mount needed, 34.9mm clamp with shims for 31.8mm and 28.6mm tubes, Four versions covering different BB widths and offsets, One version built specifically for the Surly Moonlander
Clamp diameter34.9mm, with shims for 31.8mm and 28.6mm
Derailleur typeDirect-mount front derailleur (Shimano/SRAM High Direct Mount, per version — see table)
Option values (per child)73mm BB Boost 29mm offset; 100mm BB 2x 43.5mm offset; 100mm BB standard, AL-6061; Surly Moonlander 55mm offset
SKU SCV-P-4847
Brand Problem Solvers

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