Bike Crankset 34T with 170 mm Square Taper Arms and 104 BCD Narrow-Wide Chainring Black

Give yourself a lower gear on the climbs you ride most

This bike crankset combines 170 mm square-taper arms with a 34T narrow-wide chainring. It suits trail and cross-country riders who want a small step down from 36T. Think of a rolling route where your current gearing feels fine on the flats but a little heavy on the climbs.

With the same cassette, changing from 36T to 34T lowers every gear by about 5.6%. That lets you pedal a little faster at the same climbing speed. Compared with a 32T ring, the 34T takes you farther per pedal turn on firm, open sections.

Key Features

• The 34-tooth chainring sits between 32T and 36T for riders who want a modest gearing change.
• Alternating narrow and wide teeth help keep a compatible chain seated on the ring over uneven ground.
• The 170 mm crank arms preserve the same pedal circle when replacing another pair of that length.
• The four-bolt 104 mm BCD mount lets you replace the chainring separately when it wears.

Specifications

• Crank arm length — 170 mm
• Bottom bracket interface — square taper
• Chainring mount — four-bolt 104 mm bolt circle diameter (BCD)
• Chainring — 34 teeth with a narrow-wide profile
• Chainring outside diameter — 144.2 mm
• Chainring material — 7075 aluminium alloy
• Chainring weight — approximately 53 g
• Crank arm material — aluminium alloy
• Colour — black

Benefits

1. Make short climbs easier to pedal. A 34T ring gives you a lower gear than 36T when you use the same rear sprocket.
2. Keep your familiar crank length. If 170 mm arms suit your riding position, you can lower the gearing while keeping the same pedal circle.
3. Allow more room at the chainstay. The 144.2 mm ring is 8 mm smaller across than the 152.2 mm 36T version. Installed clearance also depends on where the ring sits and how much room the chain needs.

Common Questions

• Q: When should I choose 34T over 36T?
  A: Choose 34T if you often reach your lowest gear on short climbs and want a small reduction across the cassette. Choose 36T if you spend more time on open routes and regularly use your highest gear.
• Q: Would 32T be better for steep climbs?
  A: With the same cassette, 32T gives a lower climbing gear. Choose 34T if you want to cover more ground per pedal turn on faster sections and your lowest gear still suits the climbs you ride.
• Q: How do I check whether this bike crankset fits my frame?
  A: Check for a compatible square-taper bottom bracket and a suitable chainline. Allow space for the 144.2 mm ring and the chain where they pass the chainstay. Check that both crank arms clear the frame.
• Q: What does 104 BCD mean?
  A: It is the diameter of the circle through the centres of the four mounting bolts. Use 144.2 mm as the outside diameter when checking clearance around the ring.

Summary

Choose this 34T bike crankset if 170 mm arms suit your fit and you want slightly lower gears than 36T. It suits rides where climbs matter and you still want taller gearing than 32T offers on open sections.