Quick Summary
The CatEye BM-45 is a cycling handlebar end mirror for drop and flat bars. It has a 45 mm lens and is made from aluminium and glass. The mirror is described as an ultralight bar-end design with minimal projection from the bar.
It is made for riders who want a compact mirror at the end of the handlebar rather than a larger add-on unit. The stated bar-end fitment range is 16 mm to 25.4 mm inner diameter, so compatibility is the main check before buying.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Brand | CatEye, so the product can be identified as part of the CatEye range. |
| Model | BM-45, which distinguishes this mirror from other versions. |
| Product type | Cycling handlebar end mirror for fitting at the bar end. |
| Bar compatibility | For drop and flat bars, with 16 mm to 25.4 mm inner diameter stated for fitment checks. |
| Lens size | 45 mm lens, a useful figure when comparing mirror size. |
| Material | Aluminium and glass. |
| Weight | 45 g. |
| Included item | 3 mm Allen key included. |
What to Compare Before Buying
- Handlebar fit: Check the stated 16 mm to 25.4 mm inner diameter against your bar end.
- Bar type: This mirror is for drop and flat bars, so confirm that your bike uses one of those styles.
- Mirror size: The 45 mm lens gives you a fixed size to compare with your preference for a smaller or larger mirror.
- Included fitting tool: A 3 mm Allen key is included, which matters if you want the fitting tool in the box.
Compatibility, Size and Fit
The main compatibility check is the handlebar end opening. This mirror is stated to fit 16 mm to 25.4 mm inner diameter bars and is described for drop and flat bars. If your bike uses a different bar shape or a different internal diameter, it is not the right version.
The 45 mm lens and 45 g weight help define the size and feel of the mirror without adding bulk to the bar end.
What Is Included
- CatEye BM-45 cycling handlebar end mirror
- 3 mm Allen key
Before You Decide
Confirm the BM-45 model, the drop or flat bar fit, and the 16 mm to 25.4 mm inner diameter before choosing an offer. If you need a different bar-end size, a different mirror version is the safer choice.
Mounting The Mirror On Bar Ends
For a neat setup, plan to fit the mirror at the end of the handlebar and check that the opening matches the stated diameter range before installation. The included 3 mm Allen key helps with the basic fitting step.
Checking the View
After fitting the mirror, check the reflection from your normal riding position while stationary. Make any needed adjustments before setting off, and confirm that the mirror does not obstruct your usual grip or access to the controls.
