Direct Mount Carbon Crank – Modular, Lightweight, and Flexible
The Strummer DMCA-ULCH1 is a carbon crank arm with a Shimano-Compatible Direct Mount system, designed for riders who want a lightweight, modular crank that is easy to customize to their bike setup needs.
This crank uses T700 Carbon with a glossy marble pattern. The glossy finish provides a clean appearance while helping maintain the crank's surface durability during normal use.
The main advantage of the DMCA-ULCH1 is its modular system concept. The crank arms, spindle, and chainring use separate components, allowing users to choose a configuration based on their needs, whether for a single chainring setup, a double chainring setup, or use with a BCD 104 chainring with an additional adapter.
Main Advantages
- T700 Carbon material
- Lightweight, approximately 263 grams for the left and right crank arms
- Shimano-Compatible Direct Mount system
- Modular concept: separate crank arms, spindle, and chainring
- Can be used with a single-chainring or double-chainring setup
- Can use a BCD 104 chainring with an additional adapter
- Greater flexibility for future setup upgrades
- Easier to repair because the main components can be replaced separately
- Glossy marble-pattern finish
Modular and Easy-to-Repair Design
The Strummer DMCA-ULCH1 is designed around a modular concept, so users are not locked into just one crankset configuration.
With this system, users can choose a combination of crank arms, spindle, and chainring according to their needs. If they currently use a single chainring, they still have the option to switch to a double-chainring setup later, as long as the appropriate chainring and components are used.
The separate-component system also makes this crank easier to repair. If a particular component needs to be replaced, users do not have to replace the entire crankset.
Crank Length Options
| Crank Length | Description |
|---|---|
| 165 mm | Suitable for riders who want a higher cadence or safer pedal clearance |
| 170 mm | Common size for road bikes |
Product Weight
| Specification | Details |
|---|---|
| Crank-Only Weight | ±263 grams |
| Weight Includes | Right and left crank arms |
| Note | The weight difference between crank lengths is not significant |
Package Contents
| Component | Quantity |
|---|---|
| Right crank arm | 1 pc |
| Left crank arm | 1 pc |
| Ø29 × 0.5 mm spacer | 2 pcs |
| Ø29 × 1 mm spacer | 1 pc |
| Ø29 × 2 mm spacer | 1 pc |
| Spring washer | 1 pc |
| Plastic locking washer | 2 pcs |
| Ø29 mm spindle lock | 1 pc |
| Silver Road Spindle | 1 pc |
Note: the chainwheel image is for illustration only. The purchase includes only the left and right crank arms, road spindle, and the small components listed in the package contents section. The chainring, bottom bracket, and adapter are sold separately unless specifically stated otherwise.
Chainring Compatibility
The Strummer DMCA-ULCH1 crank is compatible with Shimano-Compatible Direct Mount chainrings.
Compatible Chainring Example
Strummer DMCR-SHM-ULA1 Ultralight AL-7075 Chainring
Shimano-Compatible Direct Mount
| Size | SKU |
|---|---|
| 32T | CRING-00050BKCNC |
| 34T | CRING-00051BKCNC |
| 40T | CRING-00052BKCNC |
| 42T | CRING-00053BKCNC |
| 52/36T | CRING-00048BKCNC |
| 53/39T | CRING-00049BKCNC |
Spindle Compatibility
This crank uses a Strummer spindle with a diameter of 29 mm.
| Product | Size | SKU |
|---|---|---|
| Strummer DMSP-SHM29-ULA Road Ultralight Spindle | 125 × 29 mm | AS-00034SL |
| Strummer DMSP-SHM29-ULA MTB Ultralight Spindle | 129 × 29 mm | AS-00033SL |
Note: the standard package already includes the Silver Road Spindle. For use with another spindle, the spindle choice must be matched to the required chainline, bottom bracket width, and frame type.
BCD 104 Adapter Compatibility
If you want to use a BCD 104 chainring, this crank can be paired with the following adapter:
| Product | SKU |
|---|---|
| Strummer ADTCR-104-SHM Chainring Adapter for Shimano Direct Mount | ADT-00079BK |
This adapter allows users to use a chainring with the BCD 104 standard on the Strummer DMCA-ULCH1 crank.
Product Specifications
| Specification | Details |
|---|---|
| Model | DMCA-ULCH1 |
| Type | Carbon Direct Mount Crank Arm |
| Material | T700 Carbon |
| Finish | Glossy Marble Pattern |
| Chainring System | Shimano-Compatible Direct Mount |
| Crank System | Modular |
| Length Options | 165 mm, 170 mm |
| Spindle Compatibility | Ø29 mm |
| Crank-Only Weight | ±263 grams |
| Chainring Compatibility | Single / Double Chainring |
| Adapter Compatibility | BCD 104 via ADTCR-104-SHM adapter |
| Adapter | Sold separately |
| Bottom Bracket | Sold separately |
| Chainring | Sold separately |
Installation Notes
Make sure the combination of crank, spindle, bottom bracket, spacer, and chainring matches the standards of the frame being used.
Apply grease to the appropriate contact areas and avoid installation with excessive torque. For the best results, installation should be performed by an experienced mechanic.
