Kalahari Vegmot Posted January 27, 2018 Posted January 27, 2018 You wont feel much of a difference at all. All it means is that if you are climbing @ 7 km / hr you will now be climbing @ 6,65 Km / hr. The Total effort to climb the whole hill will actually be greater as you will need more revs in total. More Energy will be used up.A Car Uses more petrol to climb a hill in 1st Gear than if you climb the same hill in 2nd Gear.Keep your old cassette because as you get "fitter" you might need to go back to it.The 11-42 Cassette is a nice Cassette for a 10X1 conversion.Yea, sorry. Don't see your logic. According to it, climbing in the big ring front small cog back will be the easiest. Which we all know isn't true...
dasilvarsa Posted January 27, 2018 Posted January 27, 2018 Yea, sorry. Don't see your logic. According to it, climbing in the big ring front small cog back will be the easiest. Which we all know isn't true...That's not what I said.Read Again.
Kalahari Vegmot Posted January 27, 2018 Posted January 27, 2018 That's not what I said.Read Again. You said that more revs=more power spent, did you not? So, what combination will use the least revs up a climb? Big ring front, small cog rear. What am I missing?
Pulse Posted January 28, 2018 Posted January 28, 2018 You wont feel much of a difference at all. All it means is that if you are climbing @ 7 km / hr you will now be climbing @ 6,65 Km / hr. The Total effort to climb the whole hill will actually be greater as you will need more revs in total. More Energy will be used up.A Car Uses more petrol to climb a hill in 1st Gear than if you climb the same hill in 2nd Gear.Keep your old cassette because as you get "fitter" you might need to go back to it.The 11-42 Cassette is a nice Cassette for a 10X1 conversion.The energy expenditure will be exactly the same, as it requires the same total work to be completed.Faster/slower cadence might feel easier, depending on what you are accustomed to.
ChrisF Posted February 3, 2018 Author Posted February 3, 2018 Had the 11-42 fitted at a bikeshop (doubt they are responsible for follows, so no names), and went for my first ride last weekend - with Maritz (6 year old), so just a relaxed ride. As I pulled away there was some creaking from the cassette - Sunrace, steel. (my previous cassette was a Sunrace, Aluminium - Happy) I stood on the pedal and gave it a few good kicks ... and the creaking stopped About 5km into the ride the creaking was back, and strangely typically on the donwhill, ie creaking on no pedal motion, or even worse when back pedalling .... Went home and removed the cassette, checked everything, re-fitted and checked derailure settings etc etc .... test ride at home and it was fine. This morning Maritz and I had yet another relaxed ride ... after about 7km the creaking started again ! Back at home, wheel off, cassette off, check everything, back on the bike ... and then I notice the wheel slow down quickly No break binding .... so why is the wheel slowing down so quickly ? Wheel off again, and then I notice the axle is turning smooth, but very tight !! (this was right early in January) Start stripping ..... bearing on the cassette side is oozing gunk ..... side covers off, some loose balls !! Would appreciate some feedback on bike shop at Meerendal. I see they often help out riders. Would love to support them. Anybody had work like this done at this bike shop ?? Guess my other option is to buy the bearing pullers and presses .... cost of the tools may just be disproportionate to this job though .... any ideas and feedback welcome
ChrisF Posted February 3, 2018 Author Posted February 3, 2018 It SUCKS seeing my bike on the tool stand ... and not being able to fix it for tomorrows ride .... well, NO ride until it is fixed. keep on wondering what led to this ? - certainly not "use", the bike has not done enough kilos for this type of wear ... - did I get some water into a bearing while washing it ? I know never used pressurised water, for this very reason ! -Did some of the chain degreaser possibly get in there .... I know I was carefull, still wondering .... - Did somebody over tighten the axle (those little nuts on the side), putting side loads onto the bearings .... The shaft felt smooth and free at the start of January. Fixing it is one thing, but I would love to know what to do to prevent a repeat .....
Kalahari Vegmot Posted February 3, 2018 Posted February 3, 2018 Had the 11-42 fitted at a bikeshop (doubt they are responsible for follows, so no names), and went for my first ride last weekend - with Maritz (6 year old), so just a relaxed ride. As I pulled away there was some creaking from the cassette - Sunrace, steel. (my previous cassette was a Sunrace, Aluminium - Happy) I stood on the pedal and gave it a few good kicks ... and the creaking stopped About 5km into the ride the creaking was back, and strangely typically on the donwhill, ie creaking on no pedal motion, or even worse when back pedalling .... Went home and removed the cassette, checked everything, re-fitted and checked derailure settings etc etc .... test ride at home and it was fine. This morning Maritz and I had yet another relaxed ride ... after about 7km the creaking started again ! Back at home, wheel off, cassette off, check everything, back on the bike ... and then I notice the wheel slow down quickly No break binding .... so why is the wheel slowing down so quickly ? Wheel off again, and then I notice the axle is turning smooth, but very tight !! (this was right early in January) Start stripping ..... bearing on the cassette side is oozing gunk ..... side covers off, some loose balls !! Would appreciate some feedback on bike shop at Meerendal. I see they often help out riders. Would love to support them. Anybody had work like this done at this bike shop ?? Guess my other option is to buy the bearing pullers and presses .... cost of the tools may just be disproportionate to this job though .... any ideas and feedback welcomeKnock old bearings out with a punch, press new ones in with a homemade press. Does not need to be expensive.
ChrisF Posted February 4, 2018 Author Posted February 4, 2018 Knock old bearings out with a punch, press new ones in with a homemade press. Does not need to be expensive. Thank you I dropped off the bike at the bike shop at Meerendal. Trust (hope) they will do a nice job and have my baby back on the trail quickly .... Would be nice to build up a relationship with a shop that actually helps the riders in the area. Sucks big time to be at Meerendal, perfect weather, LOTS of riders, and me pushing my bike into the shop ....
dasilvarsa Posted February 4, 2018 Posted February 4, 2018 Off-Topic Better to clean the chain and cassette off the bike. Degreaser and Paraffin can get into and damage bearings on wheels and bottom brackets.The XT derailleur uses sealed bearings on the jockey wheels.There is no such thing as a properly "sealed bearing".Brand new "sealed bearings" have very little grease in them and it's usually all on the one side because of the way they've been stored (flat) sometimes for years, in hot warehouses.Clean water should not easily enter a "sealed bearing" unless the water is under pressure.
ChrisF Posted February 7, 2018 Author Posted February 7, 2018 Update - EXCELLENT service and attention to detail from Louis and Shane at Knipe Racing (the bike shop at Meerendal) !! VERY impressed with both of them !!!!! They have replaced the bearings, even made a custom tool to be able to extract the collapsed outer race of the bearing --- TREK Durbanville just sell you a new hub ! I will post pics when I get my baby back .... let's just say I took the PLUNGE and made one mother of an upgrade to the TREK !! PS - two Bontager rims with boost hubs for sale (with new bearing at the rear).... just need to figure out a reasonable price ......
ChrisF Posted April 11, 2018 Author Posted April 11, 2018 Back on topic - "need a granny" After 18 years off bikes, and with bust knees, it was "fun" getting going again .... Glad to be able to report back that month by month my "personal bests" are getting better and better .... not segment times, but my ability to ride hills, and how much breath I have left at the top. Dont get me wrong - no ways I can keep up the young crowd. But I am now able to cycle up hills where I needed to walk up a year ago. I actually get to the top of Stairway-to-heaven with enough breath left to be able to continue to the next section without having to use the bench. For those "starting out" again after some time off a bike- by all means DO get that 11-42 !! It allows you the opportunity to get to the top without walking. As your legs recover you will use the big gear less and less .... But not having to walk does wonders for your ego. HANG IN THERE !! Keep on doing doing small to mid sized hills, soon enough the larger hills wont be an "obstacle" any more. I am now getting to that point where I am considering swopping out the 28 for 30 up front .... for now I will keep the granny option, but seeing the improvement is NICE !!
popcorn_skollie Posted April 11, 2018 Posted April 11, 2018 Back on topic - "need a granny" After 18 years off bikes, and with bust knees, it was "fun" getting going again .... Glad to be able to report back that month by month my "personal bests" are getting better and better .... not segment times, but my ability to ride hills, and how much breath I have left at the top. Dont get me wrong - no ways I can keep up the young crowd. But I am now able to cycle up hills where I needed to walk up a year ago. I actually get to the top of Stairway-to-heaven with enough breath left to be able to continue to the next section without having to use the bench. For those "starting out" again after some time off a bike- by all means DO get that 11-42 !! It allows you the opportunity to get to the top without walking. As your legs recover you will use the big gear less and less .... But not having to walk does wonders for your ego. HANG IN THERE !! Keep on doing doing small to mid sized hills, soon enough the larger hills wont be an "obstacle" any more. I am now getting to that point where I am considering swopping out the 28 for 30 up front .... for now I will keep the granny option, but seeing the improvement is NICE !! Go 30. I've come to realise just how much muscle memory counts with regards to fitness. Do the same hills you're comfortable on with the 28 and see how it feels. You'll be surprised by just how much you were selling yourself short. Don't give the climbs your all. Give it 80% - 90% and reduce cadence prior to getting tired. Anticipate lactic build up as you feel it creep up and 'rest' while you keep the cranks turning at a lower cadence. I find the slower pace helps me recover without having to stop. After I recover a bit I pick up the pace and rinse repeat. For me the important thing is to maintain movement on the ups at a varied pace. Just don't give it so much gas that you're forced to stop. I ran 11-40 with a 30 up front for quite a while. I used Tokai's main jeep climb as my measuring stick. Thought to myself. Lets give this 32 front ring a go and if I don't like it I'll just go back. A few months later and Now I'm considering a 34.
ChrisF Posted April 11, 2018 Author Posted April 11, 2018 Getting a Garmin 520 was one of my BEST purchases !! I monitor my cadence and heart rate. I used to burn out on the uphills .. either too low a gear and hurting my knees, or spinning way too fast and gasping for breath .... Now I keep a constant cadence on the uphills, trying to keep it about 90 to 100, and then tapping back the gears when my heart rate goes too high. Took a bit of concentration at first, now doing it with minimal screen watching. During the afternoon commute I now play with some of the hills I had to walk a year ago. Last week actually just got out the saddle, and powered up a short but very steep hill - in a "mid" gear ! So actively testing my limits and my knees. My upper-leg muscles are noticing the extra workouts, my knees are 99% fine thus far. To put this in some context - mid 2016 I borrowed a friends bike, and started doing 800m rides around our area. Sometimes needing time for my knees between rides !! It is GOOD to experience the positives of hanging there and regular cycling. I still find that on longer rides I use the larger gears towards the end .. but that is just plain fitness, not "bad knees". Much easier to improve fitness levels than nursing bust knees !! Actually know LOOKING for fun rides where I can gradually increase my distance ....
Recommended Posts
Archived
This topic is now archived and is closed to further replies.