originsoundd
Kona Fan
Ahhh, I see. Thank you! Didn't know that. Is that on the majority of chainrings? I don't recall the previous ones having it.
1996 Kona Hahanna
- Thread starter originsoundd
- Start date
Guinessisgoodforyou
rBotM Winner
Guinessisgoodforyou
rBotM Winner
Fault diagnosis is also easy "Ben what's wrong with this"Shimano middle chainrings got the profiling with M900 XTR. The outers a year or so later with SG-X Dual SIS. The whole range got it in 93. Everyone else had a version soon after as is the way these things go.
bikeworkshop
Old School Grand Master
The rise of front indexing brought us details on the front rings to allow shifting up onto a bigger cog without much overshift, which thumbies were more capable of.
Additionally, the teeth in line with the crank arms are cut down to allow the chain to fall onto a smaller ring.
See how the short teeth are just before the crank alignment pip:
It's a pretty complex design, and if you have the wrong rings or the right ring but with the wrong orientation, the front shifting will be poor.
Cheaper chainrings had less detailing initially, around 1993 it was getting common.
Nowdays if you change one ring size by a tooth or 2, the indexing can become almost unusable, as the chain off the smaller ring might be out of step with the larger ring!
...
Additionally, the teeth in line with the crank arms are cut down to allow the chain to fall onto a smaller ring.
See how the short teeth are just before the crank alignment pip:
It's a pretty complex design, and if you have the wrong rings or the right ring but with the wrong orientation, the front shifting will be poor.
Cheaper chainrings had less detailing initially, around 1993 it was getting common.
Nowdays if you change one ring size by a tooth or 2, the indexing can become almost unusable, as the chain off the smaller ring might be out of step with the larger ring!
...
originsoundd
Kona Fan
Wow, simple and effective. Was wondering why the front mech shifts much better now. Was this ever developed on? By Shimano or anyone else.The rise of front indexing brought us details on the front rings to allow shifting up onto a bigger cog without much overshift, which thumbies were more capable of.
View attachment 943660
Additionally, the teeth in line with the crank arms are cut down to allow the chain to fall onto a smaller ring.
See how the short teeth are just before the crank alignment pip:
View attachment 943664
It's a pretty complex design, and if you have the wrong rings or the right ring but with the wrong orientation, the front shifting will be poor.View attachment 943659
Cheaper chainrings had less detailing initially, around 1993 it was getting common.
Nowdays if you change one ring size by a tooth or 2, the indexing can become almost unusable, as the chain off the smaller ring might be out of step with the larger ring!
...
bikeworkshop
Old School Grand Master
Several companies were working on rear indexing simultaneously, but the introduction of rapidfire plus front indexing necessitated these complex ring shapes to enable the chain to climb up or drop down onto the chosen ring as soon as the derailleur took up that position.
Most other brands stuck with an infinitely adjustable front gear lever, until the point where rf+ dominated the quality mtb scene.
This olders style, particularly the thumbshifter, is still popular with people who like to build their own bikes with a level of mix-and-match, because front indexing needs all components to be compatible.
Most other brands stuck with an infinitely adjustable front gear lever, until the point where rf+ dominated the quality mtb scene.
This olders style, particularly the thumbshifter, is still popular with people who like to build their own bikes with a level of mix-and-match, because front indexing needs all components to be compatible.
GeneralOsik
Kona Fan
originsoundd
Kona Fan
So, I wasn't able to get a bike ready for my cycle to Bristol this week, so I did some servicing on my Hahanna. Not sure if it was a good idea or not but I swapped out the bars and stem. I started occasionally feeling a bit of wrist pain with the Baby Bosco bar and after riding a mates bike with wider bars I thought I'd swap on these that I had laying around. The reach before was a bit too short and this is maybe a bit too long, gonna go for a ride this evening to test it out. Also swapped on some M600 V brakes to replace the Avid SD3s that were on previously. I was never really able to adjust them properly and these seem much better in terms of build quality and whatnot. Also installed bottle cages for the journey.
Attachments
originsoundd
Kona Fan
This is the route I have planned. Tried to do a mix of all surfaces and scouted out some potential spots to pitch up for the night. I've given myself two days to complete this even though the most I've ever cycled at once was only 60km! This will be my icebreaker into the world of touring/bikepacking. Forecast looks somewhat miserable but I'm keen on firming the rain.
