Stem height above head tube
08-23-23, 06:39 PM
#1
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Stem height above head tube
Is a setup like this dangerous or just eccentric? Seems like a lot leverage on the steerer.
08-23-23, 06:52 PM
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Manufacturer should be able to tell you how much above the bearing is acceptable.
I would worry about being impaled on the extension above the stem in the event of a crash.
I would worry about being impaled on the extension above the stem in the event of a crash.
08-23-23, 07:25 PM
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Too much.
but different stem, allowing for less exposed steerer might work. I have no experience to recommend where to look for such a stem.
bigger frame likely needed, based on looking at exposed seatpost.
but different stem, allowing for less exposed steerer might work. I have no experience to recommend where to look for such a stem.
bigger frame likely needed, based on looking at exposed seatpost.
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08-23-23, 08:16 PM
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How tall is the rider?
...asking for a friend...
...asking for a friend...
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08-23-23, 08:27 PM
#6
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08-23-23, 09:03 PM
#7
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Flip that stem, find bar height and then lop off the steerer. Or find a stem with moar rise???
Obed warrenty say I can only have 35mm of stack beneath the stem but I settled on 47mm. I ain't going hahahahahahammering off road so I see no issues with that.
One can also find expansion plugs up to 90mm long. https://origin8.bike/products/fusion...mpression-plug
Obed warrenty say I can only have 35mm of stack beneath the stem but I settled on 47mm. I ain't going hahahahahahammering off road so I see no issues with that.
One can also find expansion plugs up to 90mm long. https://origin8.bike/products/fusion...mpression-plug
08-23-23, 09:42 PM
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Yes, 
expansion plug. Then new stem.
But still....why?
Maybe a rider had back surgery, could not afford a new frame for upright riding and got a deal on a cf fork for 64cm frame with long steerer?
maybe too dedicated?
expansion plug. Then new stem.But still....why?
Maybe a rider had back surgery, could not afford a new frame for upright riding and got a deal on a cf fork for 64cm frame with long steerer?
maybe too dedicated?
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08-24-23, 07:40 AM
#9
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Felt’s are twitchy. I have a Z85. Long chassis to begin with. Can only imagine that would require full attention and both hands.
08-24-23, 01:15 PM
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LOL. I ride with a heavy set masher who rides one, and when he gets up to sprint, I can see all sorts of things flexing between the fork crown and the hbar...
08-24-23, 04:03 PM
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No problem on a steel or aluminum frame but I wouldn't want that on a carbon frame / fork.
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08-25-23, 07:30 AM
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@tungsten's "flip the stem" advice is spot on. I'd guess that would move the stem down 1" to 1.5", and the spacers won't be as extreme then.
Setup doesn't say anything good about the bike shop that allegedly set it up for the rider...
Setup doesn't say anything good about the bike shop that allegedly set it up for the rider...
08-25-23, 08:05 AM
#13
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Flip that stem, find bar height and then lop off the steerer. Or find a stem with moar rise???
Obed warrenty say I can only have 35mm of stack beneath the stem but I settled on 47mm. I ain't going hahahahahahammering off road so I see no issues with that.
One can also find expansion plugs up to 90mm long. https://origin8.bike/products/fusion...mpression-plug
Obed warrenty say I can only have 35mm of stack beneath the stem but I settled on 47mm. I ain't going hahahahahahammering off road so I see no issues with that.
One can also find expansion plugs up to 90mm long. https://origin8.bike/products/fusion...mpression-plug
Ritchey 4-Axis Adjustable Stem (Black) (31.8mm) (90mm) (Adjustable) - Performance Bicycle (performancebike.com)
08-25-23, 08:19 AM
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The man himself doens't think that is excessive
Sheldon Brown's Thorn Raven Bike
I run a stem riser, rising stem and Jones H bar with 2" lift on my ebike. 1" steerer tube no less. No issues
Think I'm using the same Origin 8 riser in the first post. Not sure why they have a stack of spacers underneath the riser, getting rid of those would eliminate the stack out the top of the stem. Maybe the stock head tube was too tall?
BTW there is no reason for the stack of spacers above the stem. Once the riser is set, the headset is properly tensioned. Can put the stem anywhere you want
Sheldon Brown's Thorn Raven Bike
I run a stem riser, rising stem and Jones H bar with 2" lift on my ebike. 1" steerer tube no less. No issues
Think I'm using the same Origin 8 riser in the first post. Not sure why they have a stack of spacers underneath the riser, getting rid of those would eliminate the stack out the top of the stem. Maybe the stock head tube was too tall?
BTW there is no reason for the stack of spacers above the stem. Once the riser is set, the headset is properly tensioned. Can put the stem anywhere you want
Last edited by Pop N Wood; 08-25-23 at 08:25 AM.
08-25-23, 09:22 AM
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08-25-23, 09:42 AM
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I dont know your situation, but when I take all that into account, there is 0 worry about being impaled by a steerer extending above the stem.
08-25-23, 09:44 AM
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Aside from that bike being ragingly fugly, that is a steel steerer and steel steerers are completely different from carbon steerers when it comes to how many spacers can be safely used.
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08-25-23, 10:01 AM
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08-25-23, 11:48 AM
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How many times have you crashed? Of that, how many times were on a roadbike where you flew forward? Now consider how many hours you have ridden thru the years.
I dont know your situation, but when I take all that into account, there is 0 worry about being impaled by a steerer extending above the stem.
I dont know your situation, but when I take all that into account, there is 0 worry about being impaled by a steerer extending above the stem.
08-25-23, 11:50 AM
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08-25-23, 12:33 PM
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08-26-23, 12:56 AM
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The man himself doens't think that is excessive
Sheldon Brown's Thorn Raven Bike
I run a stem riser, rising stem and Jones H bar with 2" lift on my ebike. 1" steerer tube no less. No issues
Think I'm using the same Origin 8 riser in the first post. Not sure why they have a stack of spacers underneath the riser, getting rid of those would eliminate the stack out the top of the stem. Maybe the stock head tube was too tall?
BTW there is no reason for the stack of spacers above the stem. Once the riser is set, the headset is properly tensioned. Can put the stem anywhere you want
Sheldon Brown's Thorn Raven Bike
I run a stem riser, rising stem and Jones H bar with 2" lift on my ebike. 1" steerer tube no less. No issues
Think I'm using the same Origin 8 riser in the first post. Not sure why they have a stack of spacers underneath the riser, getting rid of those would eliminate the stack out the top of the stem. Maybe the stock head tube was too tall?
BTW there is no reason for the stack of spacers above the stem. Once the riser is set, the headset is properly tensioned. Can put the stem anywhere you want
I’m not one of the “Anything that doesn’t look like a traditional drop bar road bike will handle horrible and crash.” type. And I think the above bike probably rides just fine… but it’s a bit much.
Reminds me of his gears on gears on gears bike. Didn’t he do that? Triple with 7 in the back on an IGH.
Just saying I wouldn’t always do what Sheldon did.
Now I’m going to hide under my sheets so God doesn’t strike me down.
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08-29-23, 08:48 AM
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The stem riser attaches to the head tube securing everything. The stem can then bolt anywhere on the riser with no need for spacers.
I really like the stem riser in that regard. One can completely remove the stem an handlebars without affecting the head set tension.
I really like the stem riser in that regard. One can completely remove the stem an handlebars without affecting the head set tension.
08-29-23, 08:52 AM
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Ha.