The e-Ride Pro Upgrade M6 is a replacement stem that connects your handlebars directly to your fork without a separate headset spacer
The e-Ride Pro Upgrade M6 Direct Mount Stem is an aftermarket component designed to replace your bike's original stem. Instead of using a traditional clamp-and-spacer design, it mounts handlebars directly onto the fork's steerer tube using an M6 bolt pattern. This is a mechanical upgrade, not a software or electrical one — it changes how your bars connect to your bike, not how your bike performs.
Direct mount stems are lighter and stiffer than traditional stems because they eliminate the intermediate spacer layer. They also give you a cleaner look under the bars. The M6 specification means the bolt holes on the stem are sized for M6 fasteners, which is a common standard across many bike brands and aftermarket parts.
This stem is marketed as an upgrade for e-bikes, particularly models that come with heavier or less rigid original equipment. If you own an e-bike with a standard threaded or tapered steerer tube, you may be able to swap in this stem, but compatibility depends on your fork's steerer diameter and your handlebars' clamp diameter.
Key Takeaways
- The e-Ride Pro Upgrade M6 is a direct mount stem that replaces your original stem and connects handlebars straight to the fork steerer tube.
- Direct mount stems are lighter and stiffer than traditional stems because they skip the spacer layer, which some riders prefer for handling feel.
- Compatibility requires matching your fork's steerer tube diameter (usually 1 1/8" or 1.5") and your handlebars' clamp diameter (usually 31.8mm or 35mm).
- Installation involves removing your original stem, bars, and any spacers, then bolting the new stem directly to the steerer tube with M6 fasteners.
- This is a mechanical component swap, not a performance upgrade that changes how your motor or battery works.
Steerer tube diameter and handlebar clamp size determine whether this stem will fit
Before you buy, you need to know two measurements: your fork's steerer tube diameter and your handlebars' clamp diameter. The steerer tube is the part of the fork that goes inside your headset. Common sizes are 1 1/8 inch (28.6mm) and 1.5 inches (38.1mm). Some older or specialty bikes use 1 inch (25.4mm) or 1 1/4 inch (31.75mm).
Your handlebars' clamp diameter is how wide the stem's grip is. Standard sizes are 31.8mm (the most common on modern bikes) and 35mm (common on downhill and some e-bikes). Some specialty bars are 25.4mm or 28.6mm. The e-Ride Pro Upgrade M6 comes in specific configurations — you need to match both the steerer size and the bar clamp size to what you have.
To find these measurements, check your bike's spec sheet or contact the manufacturer. If you have the original stem, you can measure the clamp diameter with calipers. For the steerer tube, you may need to remove the stem and measure directly, or ask a bike shop to check for you.
How the M6 direct mount design differs from traditional stems
A traditional stem uses a wedge or expander bolt that tightens inside the steerer tube, then a separate clamp holds the handlebars. This design requires spacers above and below the stem to set your bar height. The direct mount approach skips the wedge and spacer — the stem bolts directly to the top of the steerer tube using M6 fasteners that thread into the fork itself.
This design saves weight because there are fewer parts. It also increases stiffness because the connection is more direct — there is no play or flex in the wedge joint. Some riders report that direct mount stems feel more responsive when steering, though the difference is small on most bikes and depends more on your fork and bars than the stem alone.
The trade-off is adjustability. With a traditional stem, you can add or remove spacers to change bar height without replacing the stem. With a direct mount stem, your bar height is set by the stem's rise (usually 0°, 10°, or 20°), and changing height means buying a different stem. This is why direct mount stems are more common on bikes where the geometry is already dialed in.
Installation requires removing your original stem and spacers
Start by removing your handlebars and original stem. Loosen the bar clamp bolts on your current stem, slide the bars out, and set them aside. Then loosen the stem's top cap bolt (the single bolt on top of the stem) and the stem's steerer tube bolts (usually two or four bolts on the front and back of the stem). Once loose, pull the stem off the steerer tube.
Remove any spacers that were sitting on top of the steerer tube. These are the ring-shaped pieces that stack above the fork. Keep them in case you need to revert to your original stem. Clean the top of the steerer tube with a dry cloth.
Slide the e-Ride Pro Upgrade M6 stem onto the steerer tube, aligning the bolt holes. Insert the M6 bolts (these should come with the stem) and tighten them in a cross pattern — tighten one bolt a quarter turn, then the opposite bolt, then repeat. This prevents the stem from tilting. Tighten to the torque specification listed in the stem's instructions, usually between 4 and 6 Newton-meters for M6 bolts. Slide your handlebars into the clamp and tighten the bar clamp bolts in the same cross pattern.
Compatibility with e-bikes and common fork types
Most modern e-bikes use either a 1 1/8 inch or 1.5 inch tapered steerer tube. The e-Ride Pro Upgrade M6 is designed for these standard sizes. However, some e-bikes — particularly older models or those from certain manufacturers — may use a threaded steerer tube instead of a tapered one. A threaded steerer has grooves cut into it and requires a threaded headset, not a tapered one. Direct mount stems do not work on threaded steerers.
If your e-bike has a suspension fork, check whether the fork's steerer tube is long enough to accommodate the stem. Some suspension forks have shorter steerer tubes, and a direct mount stem may not have enough thread engagement to be safe. A bike shop can measure this for you.
E-bikes are heavier than acoustic bikes, so stem stiffness matters more. A direct mount stem can help reduce flex under the weight and motor torque. However, this upgrade will not change your motor's power, your battery's range, or your bike's speed — it only affects how the handlebars feel when you steer.
When a direct mount stem makes sense and when it does not
A direct mount stem is worth considering if your original stem feels loose or flexy, if you want to reduce weight on a bike you ride frequently, or if you prefer the cleaner aesthetics of a direct mount design. It is also a good choice if your bike's geometry is already set and you do not plan to change bar height.
A direct mount stem is not necessary if your original stem is solid and your bars feel responsive. It is also not the right choice if you like to adjust bar height seasonally or if you are still dialing in your bike's fit. Swapping stems multiple times to find the right height gets expensive with direct mount designs.
If you are new to bike maintenance, have a shop install it. The installation is straightforward, but over-tightening the M6 bolts can strip the fork's threads, and under-tightening can cause the stem to slip. A shop has the right tools and torque wrench to get it right the first time.
Frequently Asked Questions
Will this stem work on my threaded steerer fork?
No. Direct mount stems require a tapered steerer tube with threaded holes at the top. If your fork has a threaded steerer (grooves running along the tube), you need a traditional wedge-style stem instead. A bike shop can tell you which type you have in one minute.
Can I adjust my bar height after installing this stem?
Not without replacing the stem. Direct mount stems come in fixed rise angles — usually 0°, 10°, or 20°. If you need a different height, you have to buy a new stem with a different rise. This is why many riders keep their original stem as a backup.
Do I need special tools to install this stem?
You need a torque wrench to tighten the M6 bolts to the correct specification (usually 4 to 6 Newton-meters). You also need hex keys or Allen wrenches that fit your M6 bolts. If you do not own a torque wrench, a bike shop can install it for a small fee.
Is this stem lighter than my original stem?
Usually, yes — direct mount stems are typically 50 to 150 grams lighter than traditional stems because they have fewer parts. The exact weight difference depends on the materials and your original stem's weight. Check the product specs to compare.
Will this upgrade make my e-bike faster or give me more range?
No. This stem only changes how your handlebars connect to your fork. It does not affect your motor, battery, or overall performance. The only benefit is a stiffer feel when steering and a small weight reduction.