Straight out of the box, my my immediate thought was how little it weighs! I was expecting the stem to feel bulky and heavy but compared to the lightweight carbon stem I was changing it wasn’t terrible. Comparing the previous model, the updated stem is 15% lighter (about 50 grams) according to Redshift. To give you an idea, our 90mm stem weighs in at 228 grams which is roughly 75 grams more than the lightweight carbon stem we had been using from Bontrager. Diameter: The 27.2mm diameter requires the addition of optional shims for seat-tube diameters up to 31.8mm Five durometers of elastomer insert enable you to tune the suspension to your own preference. Jérémie Reuiller BMC Improved handling: The suspension system of the stem can help to improve handling and stability, particularly on rough terrain or when riding over bumps and potholes. The other main option to compare against would be an increased tyre size, which can also increase comfort when set at suitable pressures. Still, while this can be advantageous, it can also have downsides, such as slower rolling resistance in some cases and frame clearance in most gravel bikes.

Pros: Reduces road buzz and hand and arm fatigue, looks like a normal stem, 10 options of rise/length Going properly off-road, off-road.cc guru Pat commented: "I put it on and after two normally unpleasantly jarring gravel rides on the rutted towpath in and out of Bath, I was sold. I had to change the elastomers which was a 10-minute job, but after that I've been impressed on every surface I've used it on. It's just a shame it was a couple of days late for the Gritfest Event in Wales. Take control - customize your suspension feel to float over obstacles and maintain control over rough terrain Suspension Stem Features

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an average of the other scores: it reflects both a product's function and value – with value determined by how a product This used - by 2020 standards - narrow tyres and high pressures (23 mm and 116 psi), 77 kg rider, and showed that the TransX equated to dropping the pressure to 102 psi. The Redshift was a lot better, the equivalent being 78 psi. Not sure what size seatpost you have currently? There are a couple different ways to find out.• Most seatposts have the diameter printed somewhere near the bottom of the post. You'll need to remove the seatpost from the bike frame (mark your existing seatpost height with a bit of tape before you remove it so you can replace it easily), and look for a number like 27.2, 30.9, or 31.6 (etc.). That is the diameter of the post.

You can measure the length of your existing stem as shown in the following picture. The length is measured from the center of the handlebar to the center of the steerer tube. It's for people wanting more comfort/less hand and arm vibration from the roads, without going to wider tyres. BMC claims the torsional stiffness is equal to a standard stem and that you’ll only feel the effects of the suspension when it comes to smoothing out rougher surfaces. The stem comes with five elastomer rigidities that can be mixed and matched to fine-tune the feel. In total, there’s up to 20mm of tunable suspension. As a person who has dealt with hand numbness due to bad technique, this would be a nice layer of protection. I use on my Kinesis Tripster and I mostly ride bridleways and towpaths and it has made a big difference to my comfort levels.I was an early adopter of the stem and am a convert. I have one on my CX training bike and it provides just the right amount of comfort suspension. To me, it feels like the amount of “suspension” a perfectly inflated tire gives you. I’ve ridden mine where ever my bike takes me, from the road to riding my CX bike on mountain bike trails in the area. to status. UK residents only. Sigma Sports Limited acts as a broker “Licence Number 688619” and not Redshift Sports says: "An adjustable-stiffness suspension stem that smooths out your ride that's perfect for performance cyclists, recreational riders, and commuters.