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 material with a glossy marbling finish. The glossy coating provides a clean appearance while helping maintain the crank surface's durability under normal use.
The main advantage of the DMCA-ULCH1 is its modular system concept. The crank arm, spindle, and chainring use separate components, allowing users to choose a configuration according to their needs, whether for a single chainring setup, a double chainring setup, or use with a BCD 104 chainring and an additional adapter.
Key Features
- T700 Carbon material
- Lightweight, approximately 263 grams for the left and right crank arms
- Shimano Compatible Direct Mount system
- Modular concept: separate crank arm, spindle, and chainring
- Can be used for single-chainring or double-chainring setups
- Can use a BCD 104 chainring with an additional adapter
- Greater flexibility for upgrading the setup later
- More repairable because the main components can be replaced separately
- Glossy marbling finish
Modular and Repairable Design
The Strummer DMCA-ULCH1 is designed with a modular concept, so users are not locked into a single crankset configuration.
With this system, users can choose a combination of crank arm, spindle, and chainring according to their needs. If they are currently using a single chainring, they still have the option to switch to a double-chainring setup later, provided they use the appropriate chainring and components.
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 | Approximately 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 lock washer | 2 pcs |
| Ø29 mm spindle lock | 1 pc |
| Spindle Road Silver | 1 pc |
Note: the chainwheel image is for illustrative purposes only. The purchase includes only the left and right crank arms, road spindle, and the small parts 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 chainrings using the Shimano Compatible Direct Mount System.
Compatible Chainring Example
Chainring Strummer DMCR-SHM-ULA1 Ultralight AL-7075
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 |
|---|---|---|
| Spindle Strummer DMSP-SHM29-ULA Road Ultralight | 125 × 29 mm | AS-00034SL |
| Spindle Strummer DMSP-SHM29-ULA MTB Ultralight | 129 × 29 mm | AS-00033SL |
Note: the standard package already includes the Spindle Road Silver. 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 Marbling |
| Chainring System | Shimano Compatible Direct Mount |
| Crank System | Modular |
| Length Options | 165 mm, 170 mm |
| Spindle Compatibility | Ø29 mm |
| Crank-Only Weight | Approximately 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, spacers, and chainring is compatible with the standards of the frame being used.
Apply grease to the appropriate contact areas and avoid installing with excessive torque. For the best results, installation should be performed by an experienced mechanic.
