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threadless stem riser and adjustable extension question

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Old 02-10-15 | 02:24 PM
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Bikes: 28 yr. old Ross Mountain bike to going strong, Leman's century, Cannondale quick 3 with mid-drive Bafang and 750 watt battery. Just purchased a Navara Safari 2015. Need to make a few adjustments and find some fenders to fit.

threadless stem riser and adjustable extension question

I have two issue with my navara safari. 1st the butterfly bars are to low, so I've purchased a stem riser which I think will bring the bars up to seat level. 2nd is the real question; I am thinking of purchasing an adjustable stem riser and reversing it towards me to bring the bars closer to me so that I'm not stretched out and putting pressure unduly on my hands. I need about 3 inches closer to me. Perhaps a 80 or 90 mm extension will do it. Is there an issue with reversing the stem extension? I will need to change the cables for sure! What is your experience with this issue and how did you solve it? I like the bars for the multiple hand positions so would like to keep them if at all possible.
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Old 02-10-15 | 02:48 PM
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A Dimension stem riser I have on all my bikes.

The stock stem is simply set too low for comfortable riding in an upright position even when set at maximum extension.

A stem riser adds about 3" to that and then when you put the stock stem on it you discover the fit finally feels right.

That may have something to do with my being a short guy at 5'7". Don't forget to experiment with stems of differing lengths if necessary to fine tune your fit.
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Old 02-10-15 | 06:07 PM
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If you need to bring the stem in 3",you might not have the right size bike. How tall are you and what size did you get?
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Old 02-10-15 | 07:31 PM
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Bikes: 28 yr. old Ross Mountain bike to going strong, Leman's century, Cannondale quick 3 with mid-drive Bafang and 750 watt battery. Just purchased a Navara Safari 2015. Need to make a few adjustments and find some fenders to fit.

I'm 5'9" and have a 54. I like a more up right position. So the question is: does it matter that much if I reverse the adjustable extension?
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Old 02-11-15 | 10:39 AM
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I got a BBB BHP 21 wiggle.com | BBB BHP-20/21 Stem Extender | Oversize Stems **
to set up this Bike WB Bicycle Gallery: Robert Clark's Koga Miyata WTR


as the bars come up they also move back so maybe a short Non adjustabe stem at the top of your stem riser will Do, or the Up Angle may be sufficient ..

Cant really say with out seeing the Bike and all the parts .

some Guys Vid ** https://www.youtube.com/watch?v=TRpEjDP2u1M

Last edited by fietsbob; 02-11-15 at 12:53 PM.
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Old 02-11-15 | 10:55 AM
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Originally Posted by Kzoo1
I'm 5'9" and have a 54. I like a more up right position. So the question is: does it matter that much if I reverse the adjustable extension?
If by this you mean that you want to install the stem so that it points towards you, no, if you have to lean forward that much you have a serious problem with your bike fit
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Old 02-11-15 | 12:00 PM
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Originally Posted by dynaryder
If you need to bring the stem in 3",you might not have the right size bike. How tall are you and what size did you get?
I have the right size bikes - the stock steerer on threadless forks is cut to a preset length and is too low even with stacked spacers. Hence the need for a stem riser to get the bars up high enough for comfortable riding.
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Old 02-11-15 | 01:40 PM
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Bikes: 28 yr. old Ross Mountain bike to going strong, Leman's century, Cannondale quick 3 with mid-drive Bafang and 750 watt battery. Just purchased a Navara Safari 2015. Need to make a few adjustments and find some fenders to fit.

Thanks for the input, I'll experiment and post pictures when the solution fits my needs.
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Old 02-11-15 | 06:13 PM
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Originally Posted by Kzoo1
I'm 5'9" and have a 54. I like a more up right position. So the question is: does it matter that much if I reverse the adjustable extension?
REI's site lists the bikes by size(S/M/L/XL). Which size did you get?

Originally Posted by NormanF
Hence the need for a stem riser to get the bars up high enough for comfortable riding.
The OP's not talking about raising the stem,he's talking about moving it back 3" toward him. Basically reversing it. That's now how properly fitted bikes are configured.
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Old 02-11-15 | 06:43 PM
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Bikes: 28 yr. old Ross Mountain bike to going strong, Leman's century, Cannondale quick 3 with mid-drive Bafang and 750 watt battery. Just purchased a Navara Safari 2015. Need to make a few adjustments and find some fenders to fit.

My Navara Safari is a medium which I equate to approximate 54 size.
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Old 02-11-15 | 08:14 PM
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proper fit? it's personal. put the stem however you like. you'll find out soon enough if it's what you want.

Last edited by hueyhoolihan; 02-12-15 at 10:39 AM.
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Old 02-11-15 | 08:34 PM
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I would never recommend running a stem reversed. Steering will be wonky.

Just raise the bars and give it some time to see how it works.
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Old 02-12-15 | 01:01 AM
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Sell you bike and get one made for upright position riding. Like a vintage schwinn three speed. Very comfortable to ride.
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Old 02-12-15 | 07:18 AM
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Bikes: 28 yr. old Ross Mountain bike to going strong, Leman's century, Cannondale quick 3 with mid-drive Bafang and 750 watt battery. Just purchased a Navara Safari 2015. Need to make a few adjustments and find some fenders to fit.

I have purchased a 120mm stem riser and plan to also purchase a 80 or possibly a 95mm adjustable stem which I will reverse and position it on the stem riser up or down and angle the adjustable stem to tune in the reach and height. Butterfly bars will be adjusted up or down also. Turning the bike 20 degrees left or right with stem forward or backwards will still be 20 degrees. I think its where your center of gravity is that counts the most. I care more about how it feels more then how it looks. All comments are appreciated and once I'm on the road and have put some milage in I'll get back here to post. Being in Michigan, it may be a little while though!
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Old 02-12-15 | 09:10 AM
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Like this?
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Old 02-12-15 | 11:07 AM
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Originally Posted by Kzoo1
I have purchased a 120mm stem riser and plan to also purchase a 80 or possibly a 95mm adjustable stem which I will reverse and position it on the stem riser up or down and angle the adjustable stem to tune in the reach and height. Butterfly bars will be adjusted up or down also. Turning the bike 20 degrees left or right with stem forward or backwards will still be 20 degrees. I think its where your center of gravity is that counts the most. I care more about how it feels more then how it looks. All comments are appreciated and once I'm on the road and have put some milage in I'll get back here to post. Being in Michigan, it may be a little while though!
You do realize that installing the bars behind the stem will move them back double the distance of the length of the stem. If you have say, a 70mm stem, turning it around will move the bars back by 140 mm.If you have a 70 mm stem and you replace it with an 80 mm stem turned backwards your bars will move towards you by 6 inches. You might well end up with your knees hitting the handlebars. My take is that you need a much shorter stem, something like a BMX stem. If you want the handgrips to be higher, you can simply adjust the angle of the bars. Your bike was simply never designed to be set up the way you want to do it
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Old 02-13-15 | 11:58 AM
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Bikes: 28 yr. old Ross Mountain bike to going strong, Leman's century, Cannondale quick 3 with mid-drive Bafang and 750 watt battery. Just purchased a Navara Safari 2015. Need to make a few adjustments and find some fenders to fit.

Your point is well taken and the ultimate outcome may be quite different from original intentions. Will begin the experiment on Sunday........stay tuned for the on going battle of bike Vs man.
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Old 02-13-15 | 12:12 PM
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Only seen reversed stems on short wheel base, under seat steered, recumbents , work.
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Old 02-13-15 | 03:11 PM
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Bikes: 28 yr. old Ross Mountain bike to going strong, Leman's century, Cannondale quick 3 with mid-drive Bafang and 750 watt battery. Just purchased a Navara Safari 2015. Need to make a few adjustments and find some fenders to fit.

Thanks for the Pic! How does it handle?
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Old 02-16-15 | 03:54 PM
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Bikes: 28 yr. old Ross Mountain bike to going strong, Leman's century, Cannondale quick 3 with mid-drive Bafang and 750 watt battery. Just purchased a Navara Safari 2015. Need to make a few adjustments and find some fenders to fit.

Threadless adjustable stem project completed

Well after all the comments an insights here is the finally product with lots of possibility for tweaking it as I feel the need. I can turn the bars 180 degrees and lower the stem adjuster or raise it or leave as it is and raise it more if I want. Just like to say thanks to those who had constructive criticism.
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Old 02-16-15 | 10:46 PM
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Originally Posted by Kzoo1
Well after all the comments an insights here is the finally product with lots of possibility for tweaking it as I feel the need. I can turn the bars 180 degrees and lower the stem adjuster or raise it or leave as it is and raise it more if I want. Just like to say thanks to those who had constructive criticism.
Man, I'll say! COOL.
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