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Thread: Ask the experts
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05-16-2022, 09:20 PM #7751
Perfect, thanks
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formerly an ambassador for a few others, but the ski industry is... interesting.
Fukt: a very small amount of snow.
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05-17-2022, 06:49 AM #7752
I have a Jamis Renegade with 2X10 GRX components including an 11-36 cassette. I'd like to go 11-40 to have a bailout gear for some bikepacking I'm doing next month. It looks like it will work with current derailleur with a lot of b-screw adjustment. Any experience with this or know which cassette might work best?
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05-17-2022, 07:24 AM #7753
I am using an 11-40 on two bikes, road and gravel, using a regular long cage Ultegra derailluer. No goat link, works great. (34-50 and 32-48)
Shimano m8000
https://www.jensonusa.com/Shimano-XT...Speed-CassetteForum Cross Pollinator, gratuitously strident
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05-17-2022, 07:56 AM #7754Not a skibum
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I'm pretty sure the answer is NO, but can anyone confirm if DT Swiss 350 non-boost 15x100 can be converted to 20x110 (also not boost?!) for a possible DJ fork swap/upgrade? Uncharted territory for me on this 20mm stuff coming from XC and Trail bikes. I hate bike industry standards....
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05-17-2022, 08:01 AM #7755www.dpsskis.com
www.point6.com
formerly an ambassador for a few others, but the ski industry is... interesting.
Fukt: a very small amount of snow.
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05-17-2022, 08:09 AM #7756Not a skibum
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Plus Non-boost, Boost, Super Boost and DH 150-something standards... WTF.
Again from an XC background I'm a fan of 15mm b/c I don't need to bolt the axle on, wish they didn't do the 12mm thru for road/cx/gravel bikes, but this whole 20mm is new territory.
So many more DJ fork options in 20x110 vs 15x100 unless I'm dropping ~1k on a way too high end fork that I definitely don't need for my uses; 40+ y/o small DJ/tables and mostly pumptrack duty. May just run what I have, but if it's a matter of just end-caps makes an upgrade more feasible.
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05-17-2022, 08:26 AM #7757
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05-17-2022, 09:16 AM #7758one of those sickos
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My GF's Revolt with 105 shifts just fine with a GRX 46/30 and 11-40 AliExpress cassette. B screw is nearly maxed though.
I'm thinking about getting the same cassette and will update if it also works with Ultegra Di2.ride bikes, climb, ski, travel, cook, work to fund former, repeat.
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05-17-2022, 09:33 AM #7759
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05-17-2022, 09:45 AM #7760Registered User
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if remembering correctly the 350 came in 2 hub shell sizes so you cant convert from 15/qr to 20 due to the shell itself, dumb
that said if looking for a cheap dj fork in 15mm try to find a takeoff circus from a specialized or other oem brand which put 15mm lowers on them, you can then add the rebound damper from the better circus fork and it actually rides pretty decently for the $
mrp/dvo/xfusion and some other off brands also made small batches of dj forks with 15mm axles you may stumble across
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05-17-2022, 10:03 AM #7761Not a skibum
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Figure that's the case re different hub entirely. Have an old take-off Specialized Circus Comp w/ 15mm thru now. Kicked around an upgrade for me and pass this onto kids bike. Debating whether an X Fusion Slant is an upgrade to my current Circus Comp and there is a Cirus Expert air fork for sale locally that might be good, but is 20x110 hence the question. Complete 1st world problem
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05-17-2022, 10:17 AM #7762
I’ve got a buddy passing through town in a few days, and he’s asking me to do a bleed on his new SRAM Code RSCs. It sounds like there’s air trapped somewhere in the system causing a spongy lever feel.
I don’t have any DOT brakes and as such don’t own bleed kits for them. What’s the lowest effort way to get air out of there, without performing a full flush with two syringes? I’m envisioning filling a syringe with fluid at the lever and opening the bleed port at the caliper, ala a shimano cup gravity bleed?
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05-17-2022, 10:45 AM #7763
I am skeptical that anything you do without a proper bleed kit is going to improve the situation. With sram's bleed kit, a proper bleed takes like 2 minutes, so maybe just find someone with a bleed kit?
That said, if I only had one syringe, I'd attach it at the lever, leave the caliper closed, and pull a vacuum on the syringe to try to get any bubbles to float out. I'd do some lever flicking and line tapping too.
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05-17-2022, 10:50 AM #7764Registered User
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05-17-2022, 11:05 AM #7765Registered User
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have you thrown in the damper from a circus sport yet?
compression damper, not rebound like i said above, it completely changes the fork from crap into decently mediocre
also i think you can swap lowers from sport/comp/expert, which means you could get an expert with 20mm lowers and swap your 15mm ones on
i havent ever ridden a slant, but i love my xfusion vengeance and have had great experiences with their service dept so would be willing to try one out
reminds me i have an old argyle rct that i finally found a replacement air spring for in the garage i need to swap back on to test out, i remember loving that fork 10 years ago and wonder how it compares now
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05-18-2022, 07:20 AM #7766
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05-18-2022, 08:31 AM #7767one of those sickos
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https://www.tetongravity.com/forums/...d.php?t=346960
AliExpress products that are good threadride bikes, climb, ski, travel, cook, work to fund former, repeat.
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05-18-2022, 11:51 AM #7768
I have two wheel sets on hand that could be a great upgrade for my wife's gravel bike. Weight is really close to the same for both.
1. 2018 Specialized Roval SLX 24 aluminum wheels with DT Swiss 350 internals. 24h rear with 20h front. 20mm inner width. Hookless rim.
2. Reynolds AR41 carbon with Reynolds hubs. 24h front and rear. 21mm inner width. Hooked rim.
I have been riding the Reynolds for a few years and like them but I'm wondering if they will be a bit harsh for her. There bike is a giant revolt advanced 2(?) Carbon.
Thanks!
Seth
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05-18-2022, 01:44 PM #7769one of those sickos
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I'm seriously beating a dead horse here, but tire pressure will make a MUCH bigger difference than carbon vs aluminum rims. That Roval Al rim must be really light to get it down to carbon weight, so the Reynolds rim might actually be stronger.
The Revolt seatpost is really flexy, which further dilutes any slim possibility of feeling a difference between wheels. My GF is running 24mm IW Easton carbon wheels on her Revolt and loves them with 45mm tires at 25psi.
As a side note, I'm really loving the Redshift stem on my stiff AF Carbonda. It's worth the 130g penalty, even for my somewhat weight weenie self. I talked to them at Sea Otter and they gave me a good discount and said i could return it if I didn't like it, but that no one ever does.ride bikes, climb, ski, travel, cook, work to fund former, repeat.
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05-19-2022, 08:46 AM #7770
A very experienced shop and race wrench told me yesterday that he is using light viscosity fork oil instead of mineral oil in his brakes to reduce fade under heating. Anyone else heard of this, experimented with this?
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05-19-2022, 09:04 AM #7771
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05-19-2022, 09:06 AM #7772
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05-19-2022, 09:41 AM #7773
My understanding is that most suspension oils have additives to reduce foaming and minimize aeration of the oil, none of which would really make any difference in brakes. Synthetic suspension oils probably also hold up better to abuse over time, but again, I don't think mountain bike brakes are asking much of the oils, so I doubt that makes any real difference either.
If he's doing to it reduce fade, that would imply that suspension oil has a better ability to draw heat away from the caliper. Regardless of whether suspension oil is notably different than mineral oil in that regard, there's such a tiny quantity of oil in those systems, I'm pretty skeptical that it would make any difference at all. Synthetic oils are probably going to expand from the heat a bit less, but any modern brake has a reservoir to handle that heat expansion so I don't think there'd be any real benefit there.
Ultimately seems like the kind of thing that has some very minor theoretical advantages, zero real world advantage, but it lets the mechanic talk about it and make himself look techy and smart.
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05-19-2022, 10:02 AM #7774one of those sickos
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05-19-2022, 12:41 PM #7775
Interesting that combo doesn't swell seals or have other drawbacks.
Forum Cross Pollinator, gratuitously strident
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