If you’re reading this, chances are you’ve spent hours dialing in your gravel bike—tweaking tire pressure, adjusting saddle fore/aft, maybe even fine-tuning your handlebar tape—but the stem on your gravel bike frame still feels off. As someone who’s spent the last eight years running a gravel bike frame supplier, I’ve lost count of how many riders have stopped by our workshop, frustrated that their stem setup either leaves them stretching too far forward (cramping after 20 miles) or hunching over (nagging lower back pain on long rides). Gravel isn’t road or mountain biking; it’s that messy middle ground of dirt, gravel, and fire roads where comfort, control, and efficiency all need to play nice. That’s why adjusting your stem isn’t just a “fit tweak”—it’s one of the most impactful changes you can make to how your frame rides, no matter if you’re bombing singletrack grinding or logging 50-mile gravel gran fondos. Gravel Bike Frame
Let’s start with the basics, because too many riders skip the why before jumping to the how. The stem connects your handlebars to the steerer tube of your gravel bike frame, right? But gravel stems aren’t one-size-fits-all like road or mountain bike stems. Road stems prioritize aerodynamics for flat tarmac, and MTB stems prioritize maneuverability for tight singletrack. Gravel stems? They’re a balance of both. The length and rise (the angle of the stem relative to the steerer tube) change two key things: your reach to the bars and your overall riding position. Reach is the horizontal distance from your saddle nose to the center of your handlebars, and stack is the vertical distance—but the stem is the main bridge between those two points. If your reach is too long, you’ll overstretch your arms, putting extra strain on your shoulders and core. If it’s too short, you’ll be cramped, with your weight shifted too far back, making it hard to power up steep gravel climbs or hold a steady line on loose descents.
First, let’s get one thing straight: before you adjust anything on the stem, you need to have your saddle dialed in. I see this mistake all the time. A rider comes in saying their stem feels wrong, but their saddle is 2cm too far forward, so when they swap the stem, they’re just moving the problem. Step one: make sure your saddle is set to the right height (you should have a slight bend in your knee when the pedal is at its lowest point, heel on the pedal) and fore/aft (the front of your kneecap lines up with the center of the crank axle when the pedal is at 3 o’clock). Get that right, and your stem adjustment will be way more effective. If you don’t have a way to get a professional fit, there are quick tests you can do at home. Hop on your bike, clip in, and hold the handlebars. If you can reach the hoods (the flat part of drop bars) and your elbows are slightly bent (not fully straight, not curled up to your chest), that’s a good baseline. If your elbows are locked out, you need a shorter stem. If you’re reaching forward with your whole upper body, your core cramping after 10 minutes, you need a longer stem.
Now, the actual adjustment part. Let’s break this into two parts: choosing the right stem length, and then adjusting the stem’s height (or rise) and angle. Let’s start with length, because that’s the most common mistake I see. For gravel bikes, the sweet spot for most riders is a stem that’s 80mm to 110mm, but that can vary a lot based on your frame size and riding style. If you’re a 5’6” rider on a size small gravel frame, an 80mm to 90mm stem is probably ideal. If you’re a 6’2” rider on a size large, 100mm to 110mm is your ballpark. But here’s the thing: this isn’t a hard rule. If you love long rides and want a more upright position, a shorter stem might work for you. If you’re racing gran fondos and want a more aero position to cut through crosswinds, a longer stem might be better. But always test this with a stem that has the right clamp diameter for your gravel bike frame. Most modern gravel frames use a 31.8mm handlebar clamp, but some smaller frames or older models use 28.6mm—double-check that before you buy a new stem, because it’s the easiest mistake to make.
Once you have the right length, it’s time to adjust the stem’s rise and angle. This is where a lot of riders get confused, because “rise” and “angle” are often used interchangeably, but they’re not the same. Stem rise is the vertical difference between the center of the handlebar clamp and the center of the steerer tube clamp. A 0-degree stem (called a “flat” stem) has zero rise, so the handlebars sit level with the top of the steerer tube. A 6-degree stem has 6mm of rise, so the handlebars sit 6mm higher at the front than the steerer tube. The angle of the stem, on the other hand, is how you tilt the entire stem relative to the frame. This is done by loosening the stem bolts that clamp around the steerer tube, rotating the stem to your desired angle, and tightening them back up. Wait—so what’s the difference between adjusting rise and adjusting angle? Let’s say you have a 6-degree stem (standard for most gravel bikes) and you want the handlebars higher. You have two options: swap to a 10-degree stem (which adds 4mm of rise) or rotate your existing 6-degree stem upward. Both will raise the handlebars, but they feel different. Rotating the stem upward is quicker and doesn’t require buying a new part, but swapping the stem for a higher-degree model gives you more consistent geometry for long rides.
Here’s a quick test to figure out what rise works for you. Stand next to your bike, in your riding shoes, and measure the distance from the top of your saddle (where your sit bones rest) to the top of your handlebar hoods. If that distance is less than 10cm, you’re probably too low, leading to a hunched back. If it’s more than 15cm, you’re too high, which makes it hard to steer and react on gravel. The sweet spot is between 10cm and 15cm for most riders. If your distance is 8cm, swap to a stem with higher rise, or rotate your existing stem upward by 15 to 20 degrees. If it’s 16cm, lower the stem by rotating it downward, or get a lower-rise stem.
Wait a second—before you start wrenching on your stem, let’s talk about safety. This is non-negotiable. The steerer tube of your gravel bike frame has a minimum insertion line, marked with a small engraving on the inside of the steerer tube. When you loosen and adjust your stem, make sure the bottom of your stem clamp is at least 1cm above that minimum line. If you go below it, you risk the stem slipping down the steerer tube, which could cause a crash. I’ve seen this happen more than once at our workshop: a rider got carried away rotating their stem downward, didn’t check the insertion line, and the stem slipped out mid-ride, leaving them with a damaged front fork and a bruised ego. Always check that line. Also, never over-tighten the stem bolts. Most stems specify 5 to 8 Newton-meters (Nm) of torque for the handlebar clamp and 4 to 6 Nm for the steerer tube clamp. Use a torque wrench if you have one—those $20 ones at the bike store work fine for this. Over-tightening can crack the stem or the steerer tube, especially on carbon gravel frames, which are the standard now for most performance models.
Let’s walk through the step-by-step process, so you can do this safely in your garage. First, gather your tools: a 4mm Allen key, a 5mm Allen key, a torque wrench, and a rag to catch any grease or bolts. Start by flipping your bike upside down, or putting it in a work stand—you want the front wheel off the ground so you can spin the bars easily. Loosen the two bolts on the top of the stem that clamp the handlebars. You don’t need to remove them, just loosen them enough so the bars can rotate. Next, loosen the four bolts on the side of the stem that clamp around the steerer tube. Again, don’t remove them, just turn them counterclockwise a few times—if they’re really tight, you might need a little elbow grease, but don’t use a breaker bar here, you’ll strip the bolts. Once the stem is loose, you can rotate it to your desired angle, or swap it out if you’re changing length or rise. If you’re keeping the same stem, apply a thin layer of anti-seize grease to the inside of the steerer tube clamp (this prevents corrosion and makes future adjustments easier) and the outside of the steerer tube. Rotate the stem until it’s aligned the way you want—make sure it’s straight, not twisted, so your bars are parallel to the front wheel. Now, tighten the steerer tube bolts in a crisscross pattern (tighten one bolt half a turn, then the opposite one, repeat) to make sure the stem is clamped evenly. Torque them to your stem’s specs—usually 4 to 6 Nm. Then, tighten the handlebar clamp bolts, again in a crisscross pattern, to 5 to 8 Nm. Give the handlebars a firm tug to make sure they don’t move, and you’re done.
Wait, but what if you’re still not sure if your stem is right? I always recommend test rides. After adjusting your stem, take it out for a 10-mile ride on mixed terrain—pavement, gravel, a little single track. Notice where your weight shifts: if you’re constantly shifting back to avoid cramping in your shoulders, your stem is too short. If you feel like you’re about to go over the handlebars on descents, it’s too long. If your neck is sore after 2 miles, the handlebars are too high or too low. Take notes, and make small adjustments—don’t swap a stem every time you take a ride. Small changes add up: even a 10mm difference in stem length can feel like a whole new bike.
Now, let’s talk about common mistakes I see riders make when adjusting their gravel bike frame stem. First, forcing a stem that doesn’t fit their frame. A lot of riders pick a stem based on what their friend has, but every gravel frame has a unique geometry. Our gravel bike frames, for example, are designed with a 58mm stack and 39mm reach for size medium, which means a stem that works on another brand’s medium frame might not work here. Always check your frame’s geometry chart before buying a new stem—you can find it on our website, or send us a message if you have questions. Second, ignoring spacers. If you have extra spacers under your stem, don’t just yank them all out to make your bike look “sleek.” Spacers are there for a reason—they adjust the stem’s height, so if you remove them, you’ll lower the bars. If you want a lower stem, move spacers from under the stem to above it, not just remove them. Third, forgetting to check headset play. After adjusting your stem, spin the front wheel and see if there’s any play (wobbling) in the steerer tube. If there is, you need to tighten the headset cap a little, which sits on top of the stem. Loose headset play can damage your frame over time, so that’s a quick check every time you adjust your stem.
At the end of the day, adjusting your gravel bike frame’s stem is one of the most accessible upgrades you can make, and it can transform a bike that feels like a chore into one that feels like an extension of your body. But if you’re unsure about doing it yourself, or if you’re not sure what stem length or rise is right for your frame, don’t hesitate to reach out. We’ve been building gravel bike frames for years, and our team of fit experts can help you dial in every part of your setup, from stem length to saddle position, to make sure your rides are comfortable, controlled, and fun. Whether you’re a weekend warrior doing local gravel loops or a competitive rider training for long events, a properly adjusted stem makes all the difference. Don’t guess at it—take the time to test, adjust, and get it right. Your shoulders, your back, and your gravel routes will thank you.
If you have questions about stem fit for our gravel bike frames, or need help sourcing the right components for your build, feel free to connect with our team to discuss your custom build and fit needs.
Road Bike Frame References
Bicycle Frame Fit: A Guide for Gravel and Road Riders, International Bicycle Fit Association
Gravel Bike Geometry and Component Selection, Cycling Industry Manufacturers Association
Mountain and Road Bike Stem Adjustment Best Practices, The Bicycle Tech Handbook, 5th Edition
ALU-MATE Metal Industrial Co., Ltd.
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