Shimano HG201 To HG400 Cassette Upgrade - Strange Issue

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Shimano HG201 to HG400 cassette upgrade - strange issue Reply Subscribe Thread Tools Search this Thread 05-18-20 | 11:49 AM #1 sjfoote081 Thread Starter Newbie Joined: May 2017 Posts: 59 Likes: 13 From: Greensboro, GA Bikes: Trek Crossrip 1, Motobecane Fantom 650b Shimano HG201 to HG400 cassette upgrade - strange issue I am riding a TREK Crossrip with Sora mid-cage RD and HG201 11-36 cassette - been riding this combo for more than 2 years. This weekend, replaced the HG201 11-36 with a new HG400 12-36 and now there is a strange vibration / skipping feeling when under power. It is worse on the small chainring (30/46 FSA) and feels best on big-big gearing. Checked indexing and B screw and everything is fine on workstand but feels terrible when riding. Tried 2 different HG201 cassettes and they both work as expected - but - when HG400 installed - same problem. Also the chain is nearly new KMC with about 100 miles on it. Any ideas? Reply 0 0 sjfoote081 View Public Profile Find More Posts by sjfoote081 View iTrader Profile 05-18-20 | 12:45 PM #2 dsbrantjr Senior Member Joined: Sep 2010 Posts: 8,327 Likes: 1,106 From: Roswell, GA Bikes: '93 Trek 750, '92 Schwinn Crisscross, '93 Mongoose Alta Is the cassette being securely clamped by the (properly-torqued) lock ring? Is there a spacer missing? Reply 0 0 dsbrantjr View Public Profile Find More Posts by dsbrantjr View iTrader Profile 05-18-20 | 01:07 PM #3 Bill Kapaun Really Old Senior Member Joined: Feb 2007 Posts: 14,452 Likes: 1,711 From: Mid Willamette Valley, Orygun Bikes: 87 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds. 2019 Giant Explore E+3 Have you tried turning the barrel adjuster a click or 3? Reply 0 0 Bill Kapaun View Public Profile Find More Posts by Bill Kapaun View iTrader Profile 05-18-20 | 01:42 PM #4 Iride01 Facts just confuse people Joined: Jul 2017 Posts: 18,692 Likes: 6,688 From: Mississippi Bikes: Tarmac Disc Comp Di2 - 2020 Did you heed the chain advice on page four of the DM? https://si.shimano.com/pdfs/dm/DM-RBCS001-02-ENG.pdf Reply 0 0 Iride01 View Public Profile Find More Posts by Iride01 View iTrader Profile 05-18-20 | 02:50 PM #5 sjfoote081 Thread Starter Newbie Joined: May 2017 Posts: 59 Likes: 13 From: Greensboro, GA Bikes: Trek Crossrip 1, Motobecane Fantom 650b Quote: Originally Posted by dsbrantjr Is the cassette being securely clamped by the (properly-torqued) lock ring? Is there a spacer missing? Yes, I have checked and verified cassette is installed correctly and torqued to spec. There are no additional spacers that I am aware of - none came with the cassette. It is standard 9 speed shimano so I would think exact replacement for the original cassette. Reply 0 0 sjfoote081 View Public Profile Find More Posts by sjfoote081 View iTrader Profile 05-18-20 | 02:57 PM #6 sjfoote081 Thread Starter Newbie Joined: May 2017 Posts: 59 Likes: 13 From: Greensboro, GA Bikes: Trek Crossrip 1, Motobecane Fantom 650b Quote: Originally Posted by Bill Kapaun Have you tried turning the barrel adjuster a click or 3? Yes, went thru indexing again and everything works great on the workstand - shifts like a dream until under load. Quote: Originally Posted by Iride01 Did you heed the chain advice on page four of the DM? https://si.shimano.com/pdfs/dm/DM-RBCS001-02-ENG.pdf Yes, I read that section of the manual and verified that the original HG201 cassette used HG53 or HG73 chain and that the new HG400 cassette can use these same HG53/HG73 chains (in addition to 2 others), so it seems that the KMC chain that works for original cassette should work with new cassette. Reply 0 0 sjfoote081 View Public Profile Find More Posts by sjfoote081 View iTrader Profile 05-18-20 | 04:21 PM #7 Bill Kapaun Really Old Senior Member Joined: Feb 2007 Posts: 14,452 Likes: 1,711 From: Mid Willamette Valley, Orygun Bikes: 87 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds. 2019 Giant Explore E+3 Quote: Originally Posted by sjfoote081 Yes, went thru indexing again and everything works great on the workstand - shifts like a dream until under load.... I usually have to change the adjuster a click or 2 from the stand to the road. Apparently my weight on the bike changes "something" a little bit. Reply 0 0 Bill Kapaun View Public Profile Find More Posts by Bill Kapaun View iTrader Profile 05-19-20 | 10:52 AM #8 sjfoote081 Thread Starter Newbie Joined: May 2017 Posts: 59 Likes: 13 From: Greensboro, GA Bikes: Trek Crossrip 1, Motobecane Fantom 650b Decided to just return the cassette and stick with what I know works. Thanks for all the suggestions! Reply 0 0 sjfoote081 View Public Profile Find More Posts by sjfoote081 View iTrader Profile Reply Subscribe Back to Subforum Bicycle Mechanics View Next Unread Brake arm clamp Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are Off Pingbacks are Off Refbacks are Off Forum Rules Thread Tools Show Printable Version Search this Thread Advanced Search Thread Tools Show Printable Version Email this Page Advanced Search Reply Closed Thread Share

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