Delta Cycle Bike Bicycle Stem Raiser Riser Pro Extender Head Up Handlebar Raiser
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- increases bar height by up to 4.6"
- polished aluminum with anodized finish
- machined alloy top cap for easy installation
- forged and heat treated for extra strenght
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From the manufacturer
The simple way to increase handlebar height.
Unordinary Gear for the Practical Cyclist
For more than 20 years, Delta Cycle has designed elegant cycling accessories and storage solutions to complement a multitude of spaces and lifestyles.
Delta Stem Raiser
Raise the bar to the max
Make your ride more comfortable by putting less pressure on your back and shoulders. Easy to install and easy to remove, for a more extreme riding position. Don't take a hiatus from riding due to discomfort, simply raise the bar!
- Allows for adjustment of up to 3 1/4" (82.5 mm) of stem height.
• Increases bar height up to 4.6"
• High end polishing aluminum with anodized finish
• Machined aluminum top cap is threaded for easy installation
• For use with 1 1/8" threadless steerer tubes
Brand: Delta Cycle
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Top customer reviews
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The short version:
This is a reasonably priced product for the average rider. And it extends the usefulness of my bike from an aggressive downhill posture to a more exercise-oriented street ride. If you are conscious of weighing ounces on your carbon fiber bike, you'll find this irritating. If you want to re-use your existing bike and need a better riding position with some simple modifications, read up a little on how a threadless headset works and then check this out.
The long version:
- You will need an 5"+ extension on a screwdriver or a t-handle Allen key for the star-fangled bolt install. Note that this center screw only sets the TENSION for the headset bearing. It DOES NOT conduct the full force of holding the bearing set together with the stem. The pressure from the stem when the two back screws are tightened are what holds the headset bearing load properly. To test your leap of faith, you should be able to remove the center bolt and cap completely (leaving the two back screws on) and everything still works correctly.
- If you are unfamiliar with this threadless headset setup, you MUST look it up using many educational resources available in photos and videos on the internet - or take your bike to someone who can handle this. Otherwise you may damage the headset, set up a dangerous situation for the rider, or be extremely disappointed in a what is a reasonable piece of hardware.
- I preferred the full height setup in my case. I may still have to make some fine adjustments to the seat and the handlebar hardware. But my initial test rides are a vast improvement over the original height. I apply much less pressure to my hands on the bars and have a more upright (although less aerodynamic) posture. The bike is decidedly more top-heavy - but I am looking for comfort and don't need single-track trail maneuverability for what I do now. The nice thing is that it is easy to bring the bike back to its original configuration.
- I had to change out the FRONT BRAKE CABLE to use the full height setting. This was an easy change out using a brake cable kit from Amazon as well. All other cables had enough slack to use as-is. It is possible to re-use the front brake cable if you are not going to full height or if you already have enough slack in the cable for the riser.
- The two back screws are not the greatest quality - I recommend changing these out if you can readily get the screws from a hardware store. For what I am doing, they seem to be adequate. I chose the aluminum finish model since it matches the rest of the bike hardware. I don't expect to do any hardcore downhill riding anymore, so I have no opinion or any useful data on whether this component is "trail-rated".
The above is based on initial riding on the first day of installation. Happy and safe riding!
1. May cause steering stability issues
2. May cost you a lot more than just the cost of the raiser
I installed the raiser on the bike. First thing I noticed is the cables are not long enough for the handle bars to be raised that high. Took it to a bike shop. They said $125 for new cables and tune up to make it shift right again. But they warned me that raising the handlebars can cause instability in the steering and make you more prone to lose control. I had them change the cables out anyway. I like it. But when I started going upwards of 25 mph I noticed what they are talking about. The slightest input on your part amounts to a lot of steering. I guess has to do with the higher center-of-gravity than before using the raiser.
Two issues: First, it was difficult to get the proper pre-load on the headset bearings. It seemed that the long 5mm allen wrench was flexing before the bearings were acceptably pre-loaded. I removed the center bolt and applied a small amount of lithium grease to the threads of the bolt. After reinstalling the stem raiser with this bolt, I could easily get the play out of the bearings using acceptable torque on the center bolt.
Second, even after applying as much torque on the pinch bolts as I dared to apply, I still had an unacceptable amount of stem slippage/rotation on the steering tube. This did not occur while riding, but it was unacceptably easy to turn the handlebars left or right while holding the tire. Even with mating surfaces clean on both the steering tube and the stem raiser, I could not eliminate the slippage. After a little research, I decided to apply a carbon fiber assembly gel to the aluminum mating surfaces between the steering tube and stem raiser before assembly. Using measurably less torque during reassembly, all slippage was eliminated. Following recommendations in previously posts, I applied a small amount of blue thread lock on the pinch bolts’ threads prior to installation to ensure the slippage does not return.
The whole assembly is very secure and functional. Unlike other stem raisers, you can easily adjust the height of the stem on the Delta Pro Stem Raiser using only an allen wrench. Once the stem raiser is properly installed using the appropriate spacers on the steering tube, no spacers are needed to mount the stem to the stem raiser. The stem is easily raised or lowered on ride day according to your needs.
Most recent customer reviews
You will need a long hex tool or what some call Allen Wrench more than 5 inches to reach the long cap bolt...Read more