The cup holder is engineered for mounting on bicycle frames where standard plastic fixtures fail under repeated impact and vibration.

It provides a rigid enclosure that retains beverage containers ranging from 350 ml to 750 ml bottles without deformation.

Design focuses on minimizing added weight while maximizing resistance to torsional loads encountered during off‑road riding.

Primary construction uses cold‑rolled steel sheet with a minimum yield strength of 350 MPa, selected for its fatigue endurance under cyclic loading.

Surface treatment consists of a zinc‑nickel electroplating layer (8 µm thickness) followed by a clear passivation coat, providing corrosion resistance rated to 500 hours salt spray per ASTM B117.

Alternative stainless‑steel grades (AISI 304 or 316) are available upon request for environments with higher chloride exposure.

The holder features a split‑ring geometry that clamps around the frame tube using two M5 set‑screws with nylon inserts to prevent loosening.

Inner diameter is 74 mm with a tolerance of ±0.2 mm, allowing a snug fit for standard bottle necks while accommodating thermal expansion.

A drainage slot of 2 mm width is machined at the base to evacuate water and prevent accumulation inside the cavity.

Static pull‑out tests on a 25 mm steel tube show a failure load exceeding 1.2 kN when the load is applied vertically through the bottle axis.

Vibration fatigue testing follows ISO 10816‑3, subjecting the assembly to 10 g RMS acceleration across 5‑500 Hz for 10⁶ cycles with no observable cracking or permanent deformation.

Impact resistance is evaluated using a drop‑hammer of 0.5 kg from 150 mm height onto the holder’s outer wall; the part retains full functionality after 50 repetitions.

• Adjustable clamp width to accommodate frame tubes from 22 mm to 35 mm diameter.
• Optional integrated strap holder for securing lightweight accessories.
• Choice of finish: black powder coating (minimum 80 µm), chrome plating, or brushed nickel.
• Laser‑etched logo or part number on the outer surface, depth 0.05 mm.
• Pre‑drilled mounting holes for alternative fastener sizes (M4, M6).

Mountain bike frames where rough terrain generates high‑frequency vibrations that would dislodge plastic holders.

Commuter bicycles used in urban environments with frequent stops and starts, requiring reliable bottle retention.

Cargo bicycles carrying heavy loads where frame stiffness is critical and additional weight must be minimized.

Custom‑built bicycles for endurance events where aerodynamics and weight are optimized, yet hydration access remains essential.

Incoming steel coils are inspected for thickness uniformity and surface defects using laser micrometry and visual grading per ISO 9013.

Each batch undergoes salt‑spray testing; acceptance criterion is less than 5 % red rust after 480 hours.

Final assembly is verified with torque‑audit on set‑screws (target 2.5 Nm ±10 %) and a functional pull test at 50 % of rated load.

Traceability is maintained via laser‑etched batch codes enabling root‑cause analysis if a field issue arises.

• Can dimensions be customized? Yes, clamp width, inner diameter, and mounting hole pattern can be adjusted according to frame specifications.
• What information is required before quotation? Frame tube diameter, desired finish, order quantity, and any special labeling or packaging needs.
• What materials are available? Standard cold‑rolled steel with zinc‑nickel coating; optional stainless steel grades 304 or 316.
• How is quality inspected? Incoming material checks, salt‑spray corrosion testing, torque verification on fasteners, and functional load testing on each batch.
• What packaging methods are available? Parts are packed in corrugated cartons with interleaving foam sheets; custom palletization or protective sleeves can be arranged.
• How are export shipments protected? Cartons are sealed with moisture‑barrier liners and secured with strapping; pallets are stretch‑wrapped and labeled for handling.
• What is the typical production lead time? 3‑4 weeks for standard configurations; 5‑6 weeks for customized finishes or special tooling.
• How are samples arranged? Sample units can be shipped upon receipt of a signed NDA and specification sheet; lead time is typically 10 business days.

For technical inquiries, quotation requests, or to discuss application‑specific requirements, please contact our engineering team.