We often see claims made by manufacturers about how they've
"prolonged bearing life by xx%, enhanced shielding technology, and made service easy as pie," but does that actually shake out in real life? Bearing life fluctuates drastically depending on where you live and how often you ride, so it can be hard to pin down the culprit when it comes to premature wear and tear. In my little world, when I was living on California's dry and dusty Central Coast, I'd often go a couple years without having to replace any main bearings. Now that my riding all takes place in and around Bellingham, Washington, those service cycles are a whole lot quicker, often occurring several times in one year. Wet, gritty, cold trails are hell on bearings, but boy are they fun to ride.
So, given your climate, ride frequency, and number of bikes, how often do you end up having to service the main bearings on the frame? Choose the poll that's applicable to the climate where you live and vote accordingly.
Climate ZonesDry and Arid (i.e. Southwest, California, etc)
Temperate, Average Seasons (Mountain West, Central Europe, etc.)
Very Wet (Pacific Northwest, UK, etc.)
Riding Frequency
Bottom Bracket Replacement
Lower Headset Bearing Replacement
Upper Headset Bearing Replacement
Main Pivot Bearing Replacement
256 Comments
Your answer should be an average of "when" it is "needed"
I’ve found that most bearings last a very long time as long as they aren’t subject to excessive moisture. It’s rare for us to ride in the rain, as our dirt is such that the trails quickly become unrideable. So as long as I’m careful when washing my bikes, the bearings rarely need replacing.
Silly set of questions to direct an answer that they wanted.
Replace things when they need replaced. There are folk out there that religiously replace things, never been that guy, it's just a waste of money. Have the spares available and replace as required.
.....the press fit BB on that bike was a completely different story.
Think about "your" normal. One year you went through 3 sets, one year you went through 1 set. BOTH times as needed. But on average, twice a year.
I know, math is hard. But we can do it together.
My complaint would be...how much are you riding? I rode over 1000 hours this year, which is my normal. According to Garmin data...I ride a lot more than the average.
stainless steel bearings are even worse, as Ss is actually softer than carbon steel.
I detest headset cable routing, and will fight it whenever I can, so I understand that most people saw right through this poll and went straight to angry comments. In fact, I did the same down below
I suspect this skews the result a lot because ppl will answer in the wrong section anyway and the averages are .. well fairly average, making it harder to distinguish signal from noise in the survey results
JK, I ride an HT too and its not nearly as rough on the body as most people seem to think.
This survey was created by an amateur. Levy? Is that you?
For me that would be tens of times per year that fussing with headset cable routing would be an inconvenience
Scott marketing dept: "Our research is suggesting no-one likes bikes, so for 2025 we think we should NOT release a bike, like at all. It's what people want."
bikerumor.com/what-bike-mechanics-really-think-about-internal-cable-routing-headsets
One of the responses: “ Some bikes with fully internal and integrated cabling that are ridden in places in conditions that like to eat headset bearings regularly, like cyclocross or mountain bike, should be avoided if you’re asking this mechanic.”
And another: “ A lot of this stuff is just for manufacturers to tout marginal weight savings over last year’s model. If you do away with downtube cable ports or housing bosses, you move the port to the headset, and suddenly your frame is X amount of grams lighter. It’s all a scam, there is no legit reason outside of aerodynamics to move the routing to the headset. So, if you see this routing on anything but a pro level bike, and you think it’s rad, you’ve been had.”
Gave me a laugh. Even from a road biased perspective, mechanics generally don’t seem to be loving this trend.
My Enduro frame came with an FSA headset that bled rusty goo and creaked like hell in about 3 months of winter riding.
Two years later the replacement wolftooth headset has never been touched.
Misaligned trunnion frame eats bearings in about 4-6 months, other bike ridden concurrently has never had the bearings replaced in 2.5 years.
DUB bbs accept crooked tapping much better and have lasted 2-3 times as long as bsa30 for me, usually about 18 months.
TLDR; Bike companies please stop trying to hide cables-- just align your frames better and use higher quality parts.
Simply remove the stem, drop the fork remove bearing cartridge from the cups and wipe clean using isopropyl- alcohol and clean rags/ paper towels to help removal of old grease and dirt....apply a thin layer of fresh waterproof bicycle grease to the the bearings and cups; reassemble, and go ride!
They should focus on make things work better, not worse
The only bearings I’ve replaced in the last 4 years were BB, and only because they were creaking in the shell. The bearing elements were fine. I never pressure wash bikes. Only use the garden hose as much as needed to get mud off.
For me that would be tens of times per year that fussing with headset cable routing would be an inconvenience
Real answer for 99% of people
-As needed.
I don't think I've ever replaced an upper headset bearing in my life.
Bottom headset bearings usually go 2-3 seasons before getting pitted and crunchy
Bottom brackets go 1-2 seasons depending on how abused it gets (im a big guy)
Frame bearings about 2-3 seasons.
Wheel bearings 2-3 seasons.
I change frame,headset(both),Bottom Bracket and wheel bearings start of dryish season(End of April/May) so I get a good Spring Summer Ride time then maybe lower headset and bb end of the season.
Bearings are cheap compared to oval linkages etc.
Now off into the rain for a ride!
They die early due to water intrusion and corrosion. Waterproof grease = no water & corrosion.
Just need a dental pick and some good stringy waterproof grease. Green Grease 101 is just about perfect.
I also avoid washing my bikes (I clean chains and stanchions etc) and never use a pressure washer.
I change pivot bearings every year, when the shock gets serviced, as it is cheap and a few minutes extra work - the joys of a single pivot Orange.
A- im not talking about a single bike. I own several and its pretty much the same.
B- I work part time at a shop, and I've got over 20 years of experience working on bikes, so trust me when I say my sample size isn't a single crooked frame
C- even if the poor reliability is caused by frame alignment, the fact that it's so common begs the question- who's to blame? The frame manufacturers for not meeting the tolerances for the bottom bracket, or those who designed bottom brackets without accounting for typical frame alignment variability? I'd argue the latter makes more sense, although it might be a moot argument snyway.
D- old cartridge sqaure/splined bb's had their issues, dont get me wrong. Bearings would get gritty and servicing was a PITA if even possible. However, from my experience, they didn't develop play as easily and usually lasted a couple of seasons before needing replacement. Maybe im romanticizing the past, but in any case, modern bb designs are a far cry from the huge gains in reliability which were promised by those touting the new standards.
Im guilty... Multiple bikes a year...between mid 2020 and 2021 i had been on 17 different Frames.(from trail to DH)
-A week before the bearings blow up.
-A month after the bearings blow up.
Even better: it works for their hubs and BBs , too!
Shimano pedal bearings last decades, but I don’t like the shape or thickness of their flat pedals, so I guess I just have to deal with replacing pedal bearings all the time.
Also, shouldn't these be based on number of rides? Time period tells us nothing without frequency of riding. Do we just assume 12 rides per year since we're on PB?
Honestly though, as others said, the poll lacks a "when necessary" option. I have gotten lucky on my current bike, but I also had the pleasure to deal with "self destructing bottom bracket" *courtesy of lackluster QC on Cube's manufacturing). That thing need replacements when you just thought about mud and grime.
Time doesn't really mean anything - hours of use or distance traveled is way more important here
The times I did notice on a bike that needed bearing replacements were:
-a friends bike that had play in the pivot bearings, you can definitely feel that.
-when a headset can't seem to be adjusted to get no play and still move freely
-noisy bottom bracket bearings
I've never been able to find a regular interval for any of that, it is really dependent on how often you ride, where you ride and what component you have. I've never had a set schedule for riding my bike so it's hard to create a maintenance schedule and I find it wasteful to replace parts 'just cuz'.
You may not replace ever if you have high quality parts in the bike!
Usual OEM/low quality stuff is every season or 2 R&R in the midatlantic. Suspension bike pivot bearings every few seasons.
I do NOT blast my bearings with water.
I try to stay out of mud and water.
I have a year old PIVOT Trail 429 Enduro, so hopefully due to quality manufacturing and alignment not often.
Alignment/quality control and bearing quality make a huge difference.
I think keeping water of a bike makes a difference. Do not force water in and grease out!
Just say no to pressure washing bearing area.
Vancouver - 146 cm / 57.5"
North Vancouver (just across the river!) - 252 cm / 99"
Chilliwack (100 km east) - 122cm / 48"
The actual numbers that do research Into which is sealed better or which bearings are best is going to be pretty low.
Lots of great riding and great weather that’s easy on bikes.
I didn't know those were replace
options?
If it ain't broke, don't fix it.
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