Direct Mount Alloy Crank – Modular, Lightweight, and Flexible
Strummer DMCA-ULA1 is an alloy crank with a Shimano-Compatible Direct Mount system, designed for riders who want a lightweight, precise crank that is easy to adapt to their setup requirements.
This crank uses Aluminium Alloy with a CNC machining process to produce a precise shape, light weight, and clean appearance. The aluminium anodizing finish provides a clean look while helping improve surface durability.
The main advantage of this crank is its modular system concept. The crank arms, spindle, and chainring are separate components, allowing users to choose a setup combination according to their needs, whether for a single chainring, double chainring, or a BCD 104 chainring with an additional adapter.
Key Features
- Modular crank system
- Separate crank arms, spindle, and chainring
- Compatible with Shimano-Compatible Direct Mount chainrings
- Can be used for a single chainring or double chainring setup
- Can use a BCD 104 chainring with an additional adapter
- CNC machining process for precise results
- Aluminium Alloy material
- Aluminium anodizing finish
- Lightweight, approximately 415 grams for the left and right crank arms
- Easier to upgrade and repair because the main components can be replaced separately
Modular and Easy-to-Repair Concept
The Strummer DMCA-ULA1 is designed with a modular concept, so users are not locked into just one crankset configuration.
With this system, users can choose the crank length, spindle, and chainring according to their needs. If they currently use a single chainring, they will still have the option to switch to a double chainring in the future without having to purchase a new crankset.
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 |
| 167.5 mm | Middle option between 165 mm and 170 mm |
| 170 mm | Common size for road, gravel, and MTB |
Product Weight
| Specification | Details |
|---|---|
| Crank-Only Weight | ±415 grams |
| Weight Includes | Left and right crank arms |
| Note | Weight differences between crank lengths are 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 |
Note: the chainwheel image is for illustration only. The purchase includes only the left and right crank arms and the small components listed in the package contents section. The chainring, spindle, bottom bracket, and adapter are sold separately unless specifically stated otherwise.
Chainring Compatibility
The Strummer DMCA-ULA1 crank is suitable for use with a Shimano-Compatible Direct Mount System chainring.
Example of a Compatible Chainring
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 is compatible with Strummer spindles 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 spindle choice should be matched to the required chainline, bottom bracket width, and frame type.
Adapter Compatibility
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-ULA1 crank.
Product Specifications
| Specification | Details |
|---|---|
| Model | Strummer DMCA-ULA1 |
| Type | Direct Mount Crank Arm |
| Material | Aluminium Alloy |
| Process | CNC-machined |
| Finish | Aluminium Anodizing |
| Chainring System | Shimano-Compatible Direct Mount |
| Crank System | Modular |
| Length Options | 165 mm, 167.5 mm, 170 mm |
| Spindle Compatibility | Ø29 mm |
| Crank-Only Weight | ±415 grams |
| Chainring Compatibility | Single / Double Chainring |
| Adapter Compatibility | BCD 104 via ADTCR-104-SHM adapter (Sold Separately) |
Installation Notes
Make sure the combination of crank, spindle, bottom bracket, spacers, and chainring matches the standards of the frame being used. Apply grease to the appropriate contact areas and avoid installation with excessive torque.
For best results, installation should be performed by an experienced mechanic.
B2B Information (for Dealers)
Pack quantity: 20 pcs
