loctite

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Dan Empfield
aka Slowman

Thanks for the heads up and glad you are safe.

Or checking your bolts once in a while.

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Sorry to hear that. Do you routinely tighten all of the bolts on your bike? I typically check all of the vital bolts before each ride, and all the others every couple of rides

Bolts inevitably come loose from the vibrations of bike riding. Certainly not a manufacturer mistake. It is necessary to always check them to make sure things like this do not happen

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Strava

Agreed. This is a maintenance item. Drop any part against the tire and it can wedge in there. I can’t think of a bolt on a bike I haven’t seen come lose at least once over time.

I can. Yes I regularly wash and inspect my bike but things aren’t just dropping off all the time.

Loctite might have helped but ultimately my bottle cages aren’t regularly coming loose or my top tube mounted bento.

I’ll await some pics/diagrams before I just condemn the OP to not using enough Loctite.

There are bolts that don't ever really come loose, as you said the bottle cages are one, but I routinely find bolts in my stem and headset that come slightly loose. I'm not surprised that the storage box in that location would come loose over time

Any bolt that could cause catastrophic failure I check quickly before each ride. The other bolts I just give a twist to every few rides, like the brake lines and derailleurs. Simple enough maintenance and a good habit to get into

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Strava

If those bolts keep coming loose, you're using either not enough torque or low quality components. I never have to tighten a single screw on all my bikes, unless I make a plain build mistake. What happened to the OP is either installation or design issue; nothing to do with maintenance

Thanks for the warning!
My wife has a demo-model PR5 and the box came attached with tape only because the box where the bolts attach had bolt sized holes. I was still thinking of re-attaching it but will now leave it box-less.
Note: my Speed concept box is rock solid and does not need any servicing.

Yeah sorry to pile on, but this has absolutely zero to do with QR, and everything to do with you not checking your bike and/or someone not having properly tightened the bolts in the first place.

I don't even use loctite on my bike threads, I've always used bronze anti-seize on all threads, and nothing has ever come loose as long as the are tightened properly.

Glad you are OK.

Bolts are inside this box. If you watch the video online by QR it shows they are on with an automobile adhesive not screws. Mine did not Repeatedly loosen or come off. This was a first time and I had no idea the bolts were inside that box. When I asked around numerous people told me they had a problem also.

Not a QR problem. Bolts got loose onBTA bottle cage and I had to do entire race listening to this rattle noise. Since then, I check every single bolt once in a while. Loctite is definitely a good option. Blue loctite should do the work.

My Felt IA draft box bolts loosened once. Now I know to regularly check and tighten them, like all the bolts on my bike. (My road bike bottle cage bolts frequently loosen as well.)

Wouldn't a water bottle cage be an added feature? My box is an integrated feature on this bike. I do check all and tighten inc.. arm pads etc.... If this comes loose on a 120 mile ride you are screwed. Loctite Is a great tip though not sure if somebody was seriously injured that a court would say Loctite versus product liability. I will post a picture when I figure out how to put one online. I don't have a product Engineering design background but I do wonder if a lip underneath the cage Built into the bike would prevent it from rubbing on the tire causing a lock up. My goal in posting is to warn and prevent anybody from getting hurt.

if this is true you have something wrong

Well define integrated.......its still a box held on by screws, that you can remove if you don't want to use it, just like a bottle cage. Just like any part on your bike, integrated or not, its still your responsibility to make sure it is installed properly and tightened properly.

although i do genuinely feel bad that happened to you and hope you're ok, i'm also of the position that it isn't a QR problem unless you torqued them up yourself before that ride and they STILL came loose.

Glad you're okay. Seriously.

I'm going to be "that guy" and ask.........have you got Di2 on the brakes on that PR Six for doing group rides like that? So that you can sit up and participate? There have been some "yard sale" level crashes at a local group ride that mixes folks on mech shifting tri bikes with road bikes all in a pack.

That's a whole bunch of "hell no" to me.

I ride my TT bike like 75% of the time on road rides, alone. I'm a roadie, not a triathlete. I take the roadie to group rides. I've won TT races. So I "get it", but I'd rather not pile up my TT superbike in a group fueled by testosterone and inflated egos and dreams. We've got guys on group rides that bring out cheapo used roadies or cross bikes and do fine.

Seriously not trying to be a D, just saying to stay safe out there. Make good choices.

You can be that guy! :). Of course this could be entire other thread of discussion... but..., yes I have DI2, yes you sit up on ride, and yes the rides I do were I
Founded by triathletes 35+ years ago. There is a mix from pro riders to Olympic athletes who had called this group home for many years. On a different note, it's all great dialogue if it prevents one person from getting injured. I will not put my unit back on my bike because I would not trust it even if I tightened the screws right before a ride due to the stories I've heard and my own experience as this locks up your back wheel..... to me that is a whole lot different than a loose bottle cage. Be safe!

First and foremost, I'm glad you and the group are all OK.

did the mounting bolts back out completely? I have a PRFive with the same box. It is mounted by a bracket that has to M4 bolts like a bottle cage. This bracket has a lip that is designed to sit on top of the seat stays that doesnt allow the bracket to slide down into the wheel. The box then slides into the bracket and has its own lip that also interfaces with the seat stays.

The bolts holding this on would have to be backed out essentially all the way.

Here's a couple photos for those who aren't familiar with the design:

You have to be careful using anti-seize, it basically halves the torque requirement on bolts, even blue loctite in theory reduces the torque requirement.

I add blue loctite, grease or assembly paste to nearly every connection on a bike.

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Pactimo brand ambassador, ask me about promo codes

In that case, have fun and carry on! Around here it's a mess of what I would say are often relative noobs or novices at tri bikes.

Thanks for sharing that to the group. On a similar note, if anyone owns the newer Trinity with the front hydration......my kit didn't ship with new screws for the face bolts on the head tube. I assumed and reused one and it was too short. Thing fell off mid ride similar to this but didn't hurt or bind anything up. So, use longer bolts if you have the Trinity front hydration system if it didn't ship with the right bolts.

The QR tent were nice enough to reattach the box when it came off at nationals in Cleveland when the bike tipped over before check in. They explained this was a weak point and the tape was much better to hold the box and that it would be included in the future.

The very fact that a totally foreseeable problem (loose attachment bolts ,- hidden ones at that) can result in wheel lock up and crash, tells me it's a design flaw. There needs to be a stop or limiter to prevent it fouling the wheel when it comes partly loose.
Checking for loose bolts is not the right solution to this problem.

If folks have to be checking bolts every other ride, either the design of the bolted joint is shiiite, or it was assembled by a monkey.

Ty for posting pictures. That is helpful as I am not able to post pics for some reason. I'm on my phone and I believe the file is too large? The picture on the top where are you show the very tight clearance is what mine looks like also. Mine does not have any type of lip. If you slide the storage box up and off the bracket you will find two hidden screws. You cannot even see these screws if the unit is on your bike or you open the container. You have to slide your storage unit up and off. My screws did not fall out- they came loose. No lip underneath therefore it sagged on my back wheel. The guys on my ride flipped my bike upside down ( side of road) as we thought a brake was the problem as there was such an abrupt halt. They discovered my unit running so they slid it off and found 2 loose screws. I took the screws, the bracket and the unit home in my back pockets with a tired burned in spots from the friction. I am so darn lucky. There are numerous reports of the entire units coming off as the screws can come completely off. It is not reasonable to have to Inspect your bike head to toe every single ride and take off parts to look in nooks and crannies.

BobAjobb stated the 3 most important words in this post "foreseeable problem" and "flaw".

that may well be true. but i reiterate my 2 words that i consider important. loc... tite. i have one of these bikes. i have had water bottle cages come loose a number of times in the past (not on this particular bike, but on others). and other bolts. for this reason, nowadays a lot of bolts on my bikes come pre-loctited from the manufacturer. why? because of this very thing you write about. accordingly, every metal or carbon surface on my bike that touches another metal or carbon surface gets a treatment. carbon paste. anti-sieze. grease. loctite (blue). one of these 4 treatments. (maybe a pressfit BB is an exception, or a metal-on-metal handlebar-and-stem. but the exceptions are rare.)

it may well be - i don't know - that the best practice for this bike maker is to pre-loctite the threads on the screws that affix this to the frame. but, no, it is not an "integrated part" of the frame. it's an aero-shaped part that *looks* like it's integrated, just like (for example) profile design's front hydration systems that work well on this bike, or the top tube storage that looks integrated. whenever there are bosses on the bike, for water bottles, bentos, or other storage, they're not part of the frame. they're add-ons that increase the bike's functionality.

in my opinion, having had enough screws come loose that go into these bosses, it's a good idea to blue loctite the screws that holds these outboard storage devices in place. this is what i in fact do.

otherwise, i'm glad you're safe, and quite often when we have situations like this we (users and/or manufacturers) learn something.

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Dan Empfield
aka Slowman

When I trained up a guy as a mechanic (not normally my thing but the government pays for athletes to learn other skills and I'm always happy to get money from the govt) the first couple of lessons were on precisely this. Knowing what to use where makes a big difference to the outcome. I'd add prep spray and yellow loctite for BBs to your list.

My PRSix2 has the two bolts and two sided tape holding it on. If yours didn’t come with it then I would suggest adding some or contacting QR and see if they will ship some to you.

Yeah, something seems off. I don’t think I have ever checked or had to do this. Not once in ~20 years of riding.