THE SITUATION: I have a 2022 Trek Domane AL3. Aluminum wheels. I broke a spoke early this season on the back wheel. I'm not too heavy; 175 lbs. I thought maybe hitting those rough tracks after just popping the front wheel up, so that the rear slams into it might've caused it. This past Wednesday, I was riding along on smooth pavement, and I heard a PING. I looked down and the wheel was wobbly. A block later, I heard another one go: PING! I aborted the ride and limped back. I dropped the wheel off at the shop the next day. They said after 3 broken spokes, they recommend doing something besides just replacing spokes, as there are probably a bunch of others waiting to go as well. They suggested buying a new wheel or taking the wheel apart and completely re-lacing it with new spokes:

• Bontrager wheel: $300 YIKES. That's a lot of money to put into an aluminum wheel on a 4 year-old $1600 bike.
• "Bontrager Approved" wheel: $160. OK, that's not as bad.
• Labor to re-lace a wheel: $90 + spoke cost.
• Trek carbon rear wheel: $600. Yikes again. A pair of those is worth as much as the whole rest of the bike.
• Zipp wheels are even more.

The other thing I thought of was that maybe this is the motivation I need to learn to work on wheels? I have spoke wrenches and I think the right socket to remove the cassette from the hub. The thing is that it doesn't sound like fun, and I think I'd rather spend my free time riding. My only other road bike is my single speed. However, that would run the cost right down on re-lacing the current wheel.

Side question: Am I right to assume this wouldn't be happening with carbon wheels? It's something to keep in mind for the eventual replacement of this bike. I've heard that carbon wheels don't really go out of true, but it seems like it could be BS.

Spokes more often break due to fatigue than incident. Rider/load weight is but one factor but not the biggie IME. Number of spokes sharing the stresses and rider smoothness are important too. Initial build "quality" can be lacking on new bike wheels and spoke tensions often are not paid attention to on bike assemblies.

As to carbon rims not coming out of true... I wouldn't say that. And they can and do still have broken spokes happen. Andy

Maybe you can compromise with your LBS?
You could detension all the spokes.
Replace the bad side, one at a time.
Run the nipples so only the first thread showing.
Turn over to LBS to finish.

BTW- How many spokes/wheel and do you know the gauge(s)?

Spokes are cheap compared to labour, buy some and put them in yourself, buy The Bicycle Wheel (book) if you have some extra dosh.
Yes fatigue is likely the cause of your breakage; machine-built wheels are often not stress-relieved, and that may well be why.

I did see a run of spokes a while back that were breaking in the middle (unusual), a close look made me think they had been ground down to effect a butt, instead of being drawn
They were breaking at cracks initiated by any of thousands of tiny marks.
Run your fingernail along any new ones, drawn ones will be smooth.

The most common cause of spoke breakage is uneven tension. You do NOT need new wheels. Why would you? Presumably the hubs and the rims are perfectly fine. Replace the broken spokes, or if it makes you feel better, all of the spokes and nipples. Make sure your wheelbuilder does a PROPER tensioning of the spokes. Make absolutely sure he's going to use a good tensiometer. A pro always will, but it's prudent to ask.

That sounds like a good idea, if you're somewhat mechanically inclined - it actually is fun if you do it right.

• Are all of the failed spokes on one side?
• Where did they break?
• Do the spoke nipples turn easily?

You may only need to replace one side of spokes, or it may be advisable to change them all.

First thing I do with any new/used bike, after rebuilding the wheel bearings and adjusting the preload perfect, is the wheels; Take off the tires and tubes, put back in the frame (I have no truing jib, I true everything in the frame, clothespins or clamps holding popsicle sticks touching the rim laterally and radially), unscrew all the spoke nipples down to zero tension, then slowly bring them back up to tension while truing the rim. Radial true is priority, because that affects ALL spokes, whereas lateral true is local and can be adjusted with only 4 or so spokes. I spend way more time on this than any LBS would, so my true job is better. I spin the rim and sight over it, and it doesn't move, it's perfect. That, and equal tensions, and then that wheel is very durable, equalizing tensions does wonders. "Yep, that'll do it."

However, note: My small 20"/406 wheels, a long and steep descent, and using only the rear brake because the front rim sidewalls were getting too much wear, and at the bottom, going slow and no load... *ping*, just from that aluminum wheel having a high coefficient of thermal expansion, small circumference as heat sink, heat it up with a long descent using only rear brake, and it overstressed a spoke enough to pop. Riding on the flats... no, that's not a factor.

Learn to true wheels, really well. I find it very satisfying in a zen kind of way.

Just replace the spokes and do a good true job yourself.

I'd never 'built up' a wheel before until 2023. Decided to give it a go, had bought NOS tubular alloy rims & eBay'd Campy hubs identical to what was on my MBGR at the time I bought it in 1972. Bought new spokes & nipples, then an eBay'd Park truing rig (not really necessary given that others suggest it can be done as well while mounted on a bike frame) 'cause I'm kinda a 'tool guy', why I also bought a Park tensioning device.

Really, you have a wheel that's already assembled. Pulling a spoke would be my first step so you can measure its length and gage the diameter(s). Then simply count how many you want to order up & go looking for a source.

Knowing what length you need is vastly better than trying to compute it for a newbie! I'd made a mistake on my first order, it cost me some significant cash.

Were I riding your saddle I wouldn't hesitate now to replace all the spokes on that wheel....

As far as learning goes, you would be better off starting with a new front wheel. You would be starting on a rear wheel that already has issues. You could learn on this wheel, sure, but the level of frustration would be higher and the chances of success would be lower.

As already mentioned in post #3. Buy the spokes, do the re-lacing yourself and find a shop with a competent wheel person to do the final tensioning and don't cheap out on some no-name spokes. Should cost 1/3? of having them do the spoke lacing. Building a good dependable wheel takes some experience so if you're not motivated to go through the work and learning curve, best to let an expert do it. Just be certain your current hub and rim are in good condition before going forward.

"Spokes are cheap"...perhaps individually but at $3 per spoke for quality standard spokes and you relace the entire wheel of say 32 spokes all of a sudden you are dropping $100 just for the spokes...add labor and yep looking at over $200 to relace a wheel.
Where are the spokes breaking? At the same spot on all of them? Are they "J" bend or straight pull? If at the bend on J bend it could be the spoke or the hub...lots of reasons why a spoke breaks.
There are very good cost/value carbon wheelsets out there that don't cost a fortune...Elite and Super Team come immediately to mind...also ebay is a source of used and new wheels if you don't want to buy from a bike shop.
Learning how to replace a spoke isn't too hard but it can be a bit of a chore to get the right spoke type and length. You will need a variety of tools including a cassette removal tool, for rear wheel, proper nipple wrench and perhaps some sort of a spoke holder for bladed spokes...an adjustable wrench will work with a bit of tape on the faces so you don't scratch the spoke...then of course some sort of a 'truing stand'...it can be as little as a zip tie cut to length of a proper truing stand...then the knowledge of the 'art of truing'...it is as much art as science...good luck and keep us informed...

In my opinion the spokes used by Trek on most of their aluminum wheels are low end and fatigue easily. Even when the wheel is tensioned properly. I have a too to check tension. I’ve built only about 12 sets of wheels in the past 40 years so not an expert but none of my hand built wheels have broken any spokes. Wheel a few of a mtb after the chain chewed them up.

I have two pair of Aeolus wheels and never and issue. The Comp 30, Comp 25 and SL I have broken four or five spokes on each. I replace them as they brake using DT Champion spokes because these wheels use straight gauge spokes. This is not hard to do unless the spokes breaks at the nipple and one used tubeless. I’ve reused tape. Taken off and reused the Trek tubeless rim strip. This is one hassle of tubeless. The last broken spoke I just poked a hole through the rim tape and resealed the hole with a strip of rim tape.

Replacing a broken spoke is a good start to learn wheel building. Go to the trek web site and find your wheel. There should be a pdf file of the parts and the spokes used. Get a few spokes and nipples. Note the DT or other reputable brand may not have the exactly length. I used 1 mm shorter on the mtb and these can be used on both the drive and non drive side in my case. Also check the nipple length. The shop you bought the bike can also help getting the spokes and nipple. Then like others have recommended after you or the shop replace the spoke Hebrew the shop check the wheel tension and trueness.

I’d fix the wheel and if you plan on keeping the bike look at getting a second set of wheels for fast tires. :-)

After the first 300 miles, I take any new wheel I get to the LBS and have their wheel guy check the spoke tensions and adjust and true. After that they don't seem to ever give any issue for the rest of their life. I've been doing this for the last almost 20 years.

While I use to tighten any loose spokes I found. And also trued my own wheels, I knew I wasn't doing everything correctly and might be winding up with spokes that were too tight. As well, my wheels never seemed to stay true. I could have learned how to properly build a wheel. But for the one time every new wheel it seems to only be needed. I'd never be able to keep my skills honed. So I'm happy to let the people at the bike shop that go through more wheels do it for the very small pittance they charge.

It's why I don't intend to remove my own cataracts either when it comes time to do that. <grin>

Shop advice is pretty much conventional wisdom. One broken spoke can be a fluke. Two broken spokes says to watch the wheel carefully. Three broken spokes is either a bad build (uneven tension causing spokes to flex and therefore break) or possibly bad or corroded spokes. It could be something else, but that would be unusual. And yes, this would be a reasonable time to learn how to build wheels. As suggested,, replacing every spoke, one at a time, is also something of a shortcut to building a new wheel but you still would want to learn to get the right tension, even tension, and a round and true wheel.

A couple things.

Generally, I agree that an expert wheelbuilder is best. However at the LBS, they typically will not spend sufficient time to get an absolutely perfect truing job, they're on the clock. Once you get the hang of it, yes, it'll still take longer than the pro, but spending as much time as it takes to get it perfect, gets it perfect, and that, typically, can be superior to the "pro" job.

I don't have a spoke tension meter. That would be a help for knowing the correct tension. But for equalizing all the spokes on a side, I just ring'em, pluck like a string.

What's tricky for a non-pro is stress-relieving the spokes. This involves stressing the spoke just beyond its yield point, then releasing, so that under normal operation, the stress is less. The relieving is happening mostly at the J-bend I think. This can be done by grabbing a couple parallel spokes and squeezing together laterally, thick leather gloves helps. I seen described that some folks put the rim flat on the ground and walk on the spokes, I think that may have been in Jobst Brandt's book The Bicycle Wheel but my memory could be off. I have a copy deep in storage. I think factory wheels do not have the spokes stress relieved. I myself have not stress relieved any spokes, I would if I sensed it critical, but ever since doing a careful truing and tension equalization on all wheels new to me, I've yet to break a spoke. Early in the life of my current bike, I pulled off the spoke protector disc like always in the past, only the original rear derailleur was junk and allowed the chain to derail into the spokes and tore up a couple, all of which eventually failed in fatigue there. I put the protector disc back on, replaced the RD, and plan to put discs back on all my bikes when they come out of storage.

Lastly, I have 20"/406 wheels, and Bike Friday has claimed for many years that shorter spokes are stronger. Actually, no. Shorter spokes are stiffer, and longer spokes, especially double-butted spokes, elastically stretch more than shorter spokes for the same tension, and this can prevent overstressing them, improving fatigue life, and so thus actually behave as if they are "stronger". Were that not the case, double-butted spokes would not be as valued as they are. Shorter, straight gauge spokes are also stiffer in bending, so are stressed a bit more where they exit the hub, and at the nipple, unless the rims are "aimed and drilled" to keep the spokes straight there.

Here's Brandt on the subject, from this page:

"Stress relieving with a light grasp of spoke pairs is worthless, as is bouncing the wheel or bending it in a partially opened drawer. Pressing axially on the hub, while supporting the rim, requires a force larger than is manually possible but is effective for spoking machines (except the left side rear spokes that would collapse the rim). Another not-recommended method is laying the wheel on the floor and walking on it with tennis shoes, carefully stepping on each pair of crossed spokes. The method works but bends the rim and is difficult to control."

Ah, thanks, much appreciated. It's been close to 40 years since I read the book. Actually glad to know that manual stress relieving doesn't do much good, as I've never done it. One would think by now that this could be incorporated as part of the spoke manufacturing process, making the bend just a hair more than 90 degrees, so that installed, it bends back just a hair, for reduced stress on the outside of the bend, if that's where stress relieving helps.

The best test for the effectiveness of your stress relieving is to measure the tension drop after each stress relieving cycle. If the tension drops significantly bring it back up to tension and stress relieve again. When the tension no longer drops after a stress relieving cycle, you are done. You are correct, that most of the action is happening at the elbow. I can substantiate that with observations made while stress relieving straight pull spokes. After tensioning to target tension straight pull spokes will drop in tension very slightly if at all after a stress relieving cycle.

3 broken spokes is more than a fluke.

4 years shouldn't cause undue stress or corrosion unless you're on it all the time or leaving it out in terrible conditions.

The technique of lifting the front wheel up and slamming the back up and over the curb is pretty awful for a road bike. If you're doing that, you've got to find a better way up and over things. Either a proper bunny hop or just finding a different spot to mount the curb.

I do work on my own wheels. If I was in your situation, I'd replace the rim and spokes/nips. It's honestly not that hard, loads of videos. It'll cost you $200, about $120 for the rim and $80 for spokes. You'll end up with a better rim than $200 could but you. I often end up buying a new hub, because when I consider my time and long term, it's a very easy talk myself into an upgrade.

I'd also see what the widest tire I could use on your frame is, and use it.