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Thread: Ask the experts
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09-03-2021, 10:22 AM #5951Registered User
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what size of tire ? I found a noticable difference from upgrading to a 25mm from the 23mm my road bike came with
I had less flats/ more comfortable ride/ more control on sketchy on gravel paths with no real downside cuz I think they are just as fast
I would even go up a couple more mm if the tires would fit the frameLee Lau - xxx-er is the laziest Asian canuck I know
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09-03-2021, 10:36 AM #5952
Someone should make a brake with a second bleed port on the caliper that allows you to cross-bleed the caliper. Oh, wait....
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09-03-2021, 11:09 AM #5953
Thanks. I think he is probably riding this as aggressive as one of his Mtn bikes. Backcountry had Gator Skins on sale half price. I'm jumping him to a 28mm. It is strange how we have this solved on mountain bikes, but the roadies still have the same tech I was using 25 years ago!
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09-03-2021, 11:11 AM #5954Registered User
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when you think about it air in a fluid will rise, so isnt air more likely to end up in a lever ?
Are you really gona get air down thru the line to that caliper, doesn't it makes more sense to push fluid and hopefully the air bottom to the top ?
Sure smack the caliper/ lines/ lever with a srcewdriver to dislodge the air bubbles, have the bleed port on the lever sitting level and good luck !
my SLX the lever would go to the bar sitting on its side in the truck overnight but be ok after pumping the lever a few times until it sat in the truck over night again. Even tho buddy was a fairly thrifty guy he said we needed to push a whole syringe thru the system and he was right ... I gave him a nice bottle of wineLast edited by XXX-er; 09-03-2021 at 01:20 PM.
Lee Lau - xxx-er is the laziest Asian canuck I know
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09-03-2021, 11:19 AM #5955Registered User
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- Mar 2008
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well a few tubes are pretty cheap compared to new tires but otoh flats are inconvenient also there is more control with more tire
it has actualy changed my neighbor a former world class roady sez she raced on 19mm tubulars back in the 80's, I believe the trend is to bigger tires/ less PSILee Lau - xxx-er is the laziest Asian canuck I know
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09-03-2021, 11:53 AM #5956
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09-03-2021, 12:16 PM #5957
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09-03-2021, 12:30 PM #5958Registered User
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- Apr 2012
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- 348
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09-03-2021, 12:39 PM #5959
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09-03-2021, 12:58 PM #5960Registered User
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- Mar 2008
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that ^^ is simple ... its a fucking teenager
make him walk
uphill
both waysLast edited by XXX-er; 09-03-2021 at 01:31 PM.
Lee Lau - xxx-er is the laziest Asian canuck I know
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09-03-2021, 01:33 PM #5961
Back to the cassette debate. I picked up one of these for my XD hub and one for my older NX hub that uses the old shimano splines. They are like 70 bucks a piece and similar weights as GX. They take weeks to deliver since they are from China, but, it's a dirtbag option that beats the sunrace option. I haven't determined whether it will be quality, but it "looks" good. https://www.ebay.com/itm/334048161590?var=543068681952
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09-03-2021, 01:57 PM #5962
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09-03-2021, 02:14 PM #5963
https://www.ebay.com/itm/383449054137
Lists the weight as 535G. I was only looking for 12 Spd, but if you sleuth a little, I am sure you will find.
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09-03-2021, 04:14 PM #5964
Hey, I was good about pumping up my road tires when I was in college.
Of course I’m also an anal engineer with some degree of OCD, who was working in a bike shop at the time, so I probably fell way to one end of the bell curve when it came to maintaining my bikes compared to other college kids.
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09-03-2021, 04:49 PM #5965Registered User
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- Feb 2008
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- Donner Summit
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- 1,251
Yes. If he's getting pinch flats, the tire pressure is too low. At road pressures you can lose quite a bit in a day or two, even with tubes. Keep them pumped up and figure out what the right pressure is that keeps him from flatting (depends on tire width and rider weight).
If he's getting puncture flats make sure he's checking the inside of the tire carefully and not just flatting again on the same thorn or glass shard embedded in the tire casing. Generally you want to find out what's causing the flat and remove it - that can take time. Also if the tire is worn it'll get punctures more easily.
If he's patching the old tubes, make sure the patch isn't failing. A lot of the "glueless" kind will get you home but aren't a permanent fix.
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09-03-2021, 04:54 PM #5966
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09-03-2021, 04:57 PM #5967Registered User
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- Apr 2006
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- SF & the Ho
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- 9,399
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09-03-2021, 04:59 PM #5968
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09-03-2021, 06:27 PM #5969
I need new cranks
I have a Race Face Cinch 30mm BB92 Press Fit BB
when I look at the race face site it shows cranks with spindle sizes of 169, 190, and 136
how do I figure out which one might work?
(this is for a 2015 RM Instinct non-boost bike)
thanks!
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09-03-2021, 06:47 PM #5970
Anyone running carbon bars? Specifically oneup's?Every site I look to for reviews is glowing...but has paid review links that make me suspicious. Looking to minimize hand/arm pump on steep brake-bumped garbage
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09-03-2021, 06:51 PM #5971
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09-03-2021, 06:56 PM #5972
I have race face next R on one bike and oneup on the other
don't notice any major arm pump difference - but I ride harder rougher stuff on the oneup bar
if price were the same I'd go for the oneup
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09-03-2021, 07:08 PM #5973
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09-03-2021, 07:18 PM #5974
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09-03-2021, 07:39 PM #5975
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