Weird Reversed Stem Geo / Chat

Do people think a larger size bike will work better with this concept? I was looking at the Amflow PX and I am within the size range of both the L and the XL. Seems like larger might be better, since the bars come towards the seat and you have more room to play with.
 
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Hattie is running the same size frame as previously. Reeces is bigger. Stans is the same I think.

They're all utterly just so different to what we'd thibk are normal shaped bikes. Stans in particular
 
BeMoreBikes
I'm curious as to what reach frame you would run with a standard 35mm stem, and now what reach frame you use with a stem that is approximately 50mm shorter. Same frame reduced reach, or slightly longer frame and slightly reduced reach?
 
I just purchased the 90mm single crown version from @BeMoreBikes - looking forward to getting some time on it asap.

IMG_3520.webp


IMG_3521.webp
 
What I don't understand with this whole thing is, if you want your bars in that position then why not use a riser bar and a "normal" stem rather than this bizarre looking stem and a regular handlebar?
If you ran something like a BMX cruiser handlebar the bike would actually look good, rather than.... not good 🙈
 
What I don't understand with this whole thing is, if you want your bars in that position then why not use a riser bar and a "normal" stem rather than this bizarre looking stem and a regular handlebar?
If you ran something like a BMX cruiser handlebar the bike would actually look good, rather than.... not good 🙈
Because you cannot get the same position at all with what you’re suggesting. I’ve tried pretty much every combo of stem length and rise.
 
What I don't understand with this whole thing is, if you want your bars in that position then why not use a riser bar and a "normal" stem rather than this bizarre looking stem and a regular handlebar?
If you ran something like a BMX cruiser handlebar the bike would actually look good, rather than.... not good 🙈
That type of thinking would still have us on these:
IMG_0792.webp
 
What I don't understand with this whole thing is, if you want your bars in that position then why not use a riser bar and a "normal" stem rather than this bizarre looking stem and a regular handlebar?
If you ran something like a BMX cruiser handlebar the bike would actually look good, rather than.... not good 🙈
To me it looks like a steerer extender with an unusual stem on the top, but hey, what do I know? :rolleyes:
 
To me it looks like a steerer extender with an unusual stem on the top, but hey, what do I know? :rolleyes:
Thing is, 5 years ago 35mm riser bar was massive. Now it’s the norm. In fact loads of folks running 40-50mm bars as standard. Progress can be slow if we just follow what a manufacturer thinks is the best thing for us.

I’ve always like to FAFO and this concoction so far has been eye opening.
 
What I don't understand with this whole thing is, if you want your bars in that position then why not use a riser bar and a "normal" stem rather than this bizarre looking stem and a regular handlebar?
If you ran something like a BMX cruiser handlebar the bike would actually look good, rather than.... not good 🙈
You can’t get the benefit from a traditional stem. This stem changes where your input into the bar is on the steering axis. It’s not just about rise. Even a normal stem with huge rise bar pushed back to the rider wouldn’t be the same because your input is still in front of the fork steer tube if that makes sense? Could put you in similar ride position, but wouldn’t be the same effect overall.
 
Thing is, 5 years ago 35mm riser bar was massive. Now it’s the norm. In fact loads of folks running 40-50mm bars as standard. Progress can be slow if we just follow what a manufacturer thinks is the best thing for us.

I’ve always like to FAFO and this concoction so far has been eye opening.
Ignore manufacturers info because what they say is defined by what sells in the showrooms which are full of bikes with flat bars and cut down steerers. It's as much bollox as the widely touted "general principle of not having handlebars in front of the fork axle". FAFO, go only by feel and what works best. Always function before fashion, fuck what people think.
 
What I don't understand with this whole thing is, if you want your bars in that position then why not use a riser bar and a "normal" stem rather than this bizarre looking stem and a regular handlebar?
If you ran something like a BMX cruiser handlebar the bike would actually look good, rather than.... not good 🙈
I agree with you on the looks - I used 4" rise bars and short reach stems reversed, but, a normal stem won't give you -15mm reach.
 
Thing is, 5 years ago 35mm riser bar was massive. Now it’s the norm. In fact loads of folks running 40-50mm bars as standard. Progress can be slow if we just follow what a manufacturer thinks is the best thing for us.

I’ve always like to FAFO and this concoction so far has been eye opening.
Noo, 35mm rise was not massive; that's been about the norm for over 10 years I'd say. I've been running bars taller than that for over 25 years!
 
You can’t get the benefit from a traditional stem. This stem changes where your input into the bar is on the steering axis. It’s not just about rise. Even a normal stem with huge rise bar pushed back to the rider wouldn’t be the same because your input is still in front of the fork steer tube if that makes sense? Could put you in similar ride position, but wouldn’t be the same effect overall.
This is completely untrue.
The stem and bars combine to define the positional relationship between your hands and the steerer tube. How they do that between themselves makes no difference whatsoever (apart from maybe stiffness in extreme cases).
 
Noo, 35mm rise was not massive; that's been about the norm for over 10 years I'd say. I've been running bars taller than that for over 25 years!
I remember my 180/180 Kenevo came with 27mm rise bars. This was a long slack enduro sled back in the day!

IMG_3548.webp


IMG_3549.webp
 
This is completely untrue.
The stem and bars combine to define the positional relationship between your hands and the steerer tube. How they do that between themselves makes no difference whatsoever (apart from maybe stiffness in extreme cases).
its a REVERSED stem - a normal stem isnt reversed! This stem puts the bars into a reverse offset position, approx 15mm, that you cannot do with a standard 30-40mm stem.
 
its a REVERSED stem - a normal stem isnt reversed! This stem puts the bars into a reverse offset position, approx 15mm, that you cannot do with a standard 30-40mm stem.
But you can mount a stem 'wrong way round', shocking I know. :LOL:
 
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This is completely untrue.
The stem and bars combine to define the positional relationship between your hands and the steerer tube. How they do that between themselves makes no difference whatsoever (apart from maybe stiffness in extreme cases).
AI isn’t always right, but I guess we’re both wrong?
Per chat gpt:

You’re basically comparing:
  1. Traditional stem (bar clamp in front of steerer) + bars rolled back
  2. High-rise / direct-over-steerer style stem (bar clamp centered over steerer)
    → with the same final hand position

At first glance it seems like they should feel identical—but they don’t. Here’s why:

🔑 The key difference: where the bar rotates from
Even if your hands end up in the same place, the bar’s rotation point and sweep orientation change things.

Steering feel & leverage
  • With a forward clamp stem + rolled bars:
    • You’re rotating the bar backward around a point that’s in front of the steerer
    • This effectively changes the sweep and leverage feel
    • Steering can feel a bit slower or “floppier” because your input arc is altered
  • With a centered (over-steerer) clamp:
    • The bar rotates more naturally around the steering axis
    • Feels more direct and neutral
    • More consistent with how the bike was designed to steer
 
Because you cannot get the same position at all with what you’re suggesting. I’ve tried pretty much every combo of stem length and rise.
I think you can, if you start looking at what's available in the BMX world.... there is a whole world of bar designs out there in every height and dimensions imaginable.

For example, if you combine these Rixin bars (which have a 150mm rise) with a super-short stem like the S&M Reneck FLT (which has a 26mm reach, and can be run either way around) that would give you pretty much the exact same bar position as your 100mm BMore stem and 50mm rise MTB bars.
 
I think you can, if you start looking at what's available in the BMX world.... there is a whole world of bar designs out there in every height and dimensions imaginable.

For example, if you combine these Rixin bars (which have a 150mm rise) with a super-short stem like the S&M Reneck FLT (which has a 26mm reach, and can be run either way around) that would give you pretty much the exact same bar position as your 100mm BMore stem and 50mm rise MTB bars.
Interesting - good find 👊
 
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