Strummer DMCA-ULCH1 Crank
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 adjust to their bike setup needs.
This crank uses T700 Carbon material with a glossy marbling appearance. The glossy coating finish provides a clean look while helping to maintain the surface durability of the crank under normal use.
The main advantage of the DMCA-ULCH1 lies in the modular system concept. The crank arm, spindle, and chainring use a separate component system, allowing users to choose configurations according to their needs, whether for a single chainring, double chainring, or using a BCD 104 chainring with an additional adapter.
Key Advantages
- Material T700 Carbon
- Lightweight, ±263 grams for left and right crank arms
- System Shimano Compatible Direct Mount
- Modular concept: crank arm, spindle, and chainring are separate
- Can be used for single chainring or double chainring setups
- Can use a BCD 104 chainring with an additional adapter
- More flexible for upgrading the setup in the future
- More repairable because the main components can be replaced separately
- Glossy marbling finish
Modular & Repairable Concept
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 currently using a single chainring, users still have the option to change the setup to a double chainring later, as long as they use the appropriate chainring and components.
The separate component system also makes this crank easier to repair. If a specific 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 | General size for road bike |
Product Weight
| Specifications | Details |
|---|---|
| Crank Only Weight | ±263 grams |
| Weight | Right and left crank arms |
| Note | The weight difference between crank lengths is not significant |
Package Contents
| Components | Quantity |
|---|---|
| Right crank arm | 1 pcs |
| Left crank arm | 1 pcs |
| Spacer Ø29 × 0.5 mm | 2 pcs |
| Spacer Ø29 × 1 mm | 1 pcs |
| Spacer Ø29 × 2 mm | 1 pcs |
| Spring Washer | 1 pcs |
| Plastic Lock Washer | 2 pcs |
| Ø29 mm Spindle Lock | 1 pcs |
| Spindle Road Silver | 1 pcs |
Note: the image of the chainwheel is for illustration only. The purchase includes only the left-right crank arm, road spindle, and small parts listed in the package contents. Chainring, bottom bracket, and adapter are sold separately unless specifically mentioned.
Chainring Compatibility
The Strummer DMCA-ULCH1 crank is compatible with the Shimano Compatible Direct Mount System.
Examples of Suitable Chainrings
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 includes Spindle Road Silver. For the use of other spindles, spindle options need to be adjusted according to chainline requirements, bottom bracket width, and the type of frame used.
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
| Specifications | Details |
|---|---|
| Model | DMCA-ULCH1 |
| Type | Carbon Direct Mount Crank Arm |
| Material | T700 Carbon |
| Finishing | Glossy Marbling |
| 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 adapter ADTCR-104-SHM |
| Adapter | Sold separately |
| Bottom Bracket | Sold separately |
| Chainring | Sold separately |
Installation Notes
Ensure the combination of crank, spindle, bottom bracket, spacer, and chainring is compatible with the frame standards used.
Use grease on the appropriate contact areas and avoid installation with excessive torque. For best results, installation is recommended to be done by an experienced mechanic.
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