Start with our Crank Finder and search for your bike model, part code or motor. Check the exact motor model, crank interface, crank length and frame clearance against the product details before ordering.

If your bike is not listed, email help@miranda.pt with the bike brand, model, year and motor reference, plus photos of both crank arms and any markings. We will help you identify a suitable option.

Look for the exact drive-unit model or reference on the motor label, in your bicycle documentation or in the manufacturer's specifications for your bike's model and year.

The Bosch name alone is not enough to confirm crank compatibility. If you cannot find the reference, send us clear photos of the motor label and your existing crank arms. We will help you check the correct interface before you buy.

Use the dimensions specified for your exact motor and frame. The complete setup must provide enough clearance between the crank arms and the frame, with the cranks correctly positioned relative to the centre of the bike.

Check the Q-factor and DBC (distance between cranks) drawings in the Miranda catalogue. A Q code on a crank arm is not, by itself, the total width of the assembled crankset. If you are unsure, send us the motor reference and the markings on your current cranks.

Match the motor compatibility, number of teeth and offset to your existing setup. Offset describes the position of the sprocket teeth relative to the motor mounting surface.

Different sprockets can require different E-Chainguard Nuts. We recommend choosing the matching set shown in the product details. If you are replacing an existing assembly, send us its reference and clear photos so we can help you confirm the correct combination.

Visit our catalogue downloads to explore the wider Miranda range and technical drawings.

If a product appears in a catalogue but is not available in the online store, contact help@miranda.pt with the product reference and the quantity you need so we can check availability.

Our crank arms are sold in pairs: the left and right arms are supplied together.

Yes. Crank fixing bolts are included when you purchase a pair of crank arms.

Follow the installation instructions and tightening torque specified for your exact crank, fixing bolt and motor or spindle interface. There is no single torque value that applies to every Miranda crank setup.

If the instructions are missing, contact help@miranda.pt with the crank reference and motor model before installation. A qualified bicycle mechanic can help with correct fitting.

The right crank has an R engraved on the inside. Check this marking before fitting the crank arms or pedals.

RF means reinforced. These versions are designed with additional reinforcement to improve mechanical resistance and durability. The reinforcement can add weight compared with the corresponding non-reinforced version.

Everyone is welcome: individual riders, bicycle shops, retailers and resellers can all buy from the Miranda online store.

If you run a bicycle-related business, you can also apply for a B2B account for access to business conditions after approval.

We ship worldwide. Enter your delivery address at checkout to see the shipping options and charges available for your destination.

If your address is not accepted or no delivery option appears, contact help@miranda.pt with your destination and the parts you would like to order.

Free shipping is available for orders delivered within the European Union with a product value over €150, excluding taxes.

The available shipping options and final charge are shown at checkout before you complete your order.

Delivery time depends on the destination, product availability and shipping service. Please check any delivery estimate shown at checkout for your order.

If you need guidance before ordering, contact help@miranda.pt with your destination and the parts you need. For an existing order, include your order number so we can check its status.

Complete the B2B registration form with your business details. Our team will review your application before enabling business conditions on your customer account.

If you need help with the application, email help@miranda.pt.

We offer special conditions for bicycle-related businesses, subject to account review and approval. Apply for a B2B account or contact our team to discuss your business.

Once your account has been approved, sign in with the email linked to that account when ordering. If your business conditions are not appearing, contact us before completing the purchase.

Our store terms provide a 30-day withdrawal period for consumer purchases, starting after delivery. Please handle the product and packaging with care and read the Terms and Conditions for the full procedure and conditions.

To arrange a return, email help@miranda.pt with your order number and the items you wish to return. For a business purchase, contact our team to confirm the applicable conditions.

Email help@miranda.pt with your order number, a description of the issue and clear photos where relevant. For a compatibility question, include your bike model, year and motor reference.

You can also read our Commercial Warranty and Terms and Conditions for the applicable information.

For product advice and online-store support, email help@miranda.pt, use the store chat or visit our contact page.

Include your order number, product reference or bike and motor details so we can help you more quickly.