acorn54

hope you guys can help me out. i have a dawes haymaker 1000 i bought new in 2016 and i am looking to replace the transmission parts such as the rear sprocket assembly,(is that a cassette or freewheel?) i know the chain that fits is a kmc z72 as i have already done so. i'm totally in the dark as to the chainwheel on this bike below are the published specs



Frame AltairX Custom Butted-Aluminum Trail-Tuned POWER STAY frame, reinforced-gussetted downtube, sculpted rear dropouts with replaceable rear derailleur hanger, H2O boss, International Standard rear disc mounts. Rear rack mounting points.
Fork RST Capa Adjustable Long Travel 80mm, with Lockout
Crankset
TruVativ XFlow Aluminum Triple 22/32/42T, 175mm or SunTour XCT Aluminum arms (No Choice)

Bottom Bracket Sealed Cartridge
Pedals ATB Beartrap
Front Derailleur Shimano SIS Top Swing for 8 Speed Drivetrain (24 total gears)
Rear Derailleur SHIMANO RDM360 Long Cage MTB
Shifters Shimano ST-EF50 Mega 8 Speed STI (24 speeds total)
Cassette/Freewheel SHIMANO CS-HG30-8spd 11-30T
Chain 8 Speed Z72 Narrow
Hubs DiscSpecific Aluminum (black) Sealed Bearing mechanism
Spokes 14G Painted Steel
Rims Custom Disc Double Wall Aluminum disc specific
Tires Kenda Kobra Blackwall 26 x 2.0
Brakes TEKTRO Novela Mechanical Disc Brakes with Multi Pad Angle adjustments (Rotors are round or wave / No Choice)
Brake Levers Shimano ST-EF50
Headset Internal Sealed bearing VP A71 1.125 inch
Handlebar Comp Aluminum Riser
Stem Comp Threadless Aluminum 1.125 inch
Tape/Grip WTB Dual Compound Trail
Saddle WTB Speed V Sport with comfort groove
Seat Post Aluminum Micro-Adjust 27.2x300mm
Seat Clamp Aluminum w/QR


thanks in advance for your help-acorn

dedhed

What makes you think you need new chain rings.

See above

acorn54

thanks for the answer. as far as my wanting to know the chainring assembly and crankset, i wan't to be prepared in case the chain skips sometime in the future after replacing the cassette and chain. don't the teeth also wear out on the chainrings, after awhile?

alcjphil

Chainrings wear much more slowly than cassette cogs. I have chainrings that came with my 1974 Raleigh Professional that are still in good shape

andrewclaus

You'll go through quite a few cassettes before you wear out a chainring. The only one I've ever replaced where I knew its mileage had about 25K miles on it. And in that case, there were no problems with the chain skipping or sucking, it just got noisy.

dedhed

Chain rings spread the load over many more teeth (except for a small granny gear which is used infrequently usually) so wear less

acorn54

thanks al and andrew for the info on chainrings, good to know. great forum great people to help out so.

jimc101

Upto a point, and comparing vintage hardware to modern hardware isn't a great comparison, as anything pre-1990 will most likely be 7 speed or less, which will have less wear on components.

Have found that some with brands, chainrings don't last (FSA 7005 innners being one, have had a few as OEM fit on bikes) vs other Shimano, which last a lot longer.

Material they are made from, conditions ridden in and maintenance(or lack of) will all play a big factor in how long they will last