Building a Custom Badminton Racket RFQ From a Published Spec Sheet

The most-quoted figure on the YONEX ASTROX 88 D GAME specification page is "10 mm longer," and it is the one figure you cannot write into a purchase order as a number. The page states an extension relative to a base it never names; a number with no base is a question to put to your supplier, not a target.

Everything below binds to one item code, 3AX88D-G, model ASTROX 88 D GAME, as published on the page version captured for this article. Nothing transfers to the PRO or TOUR versions sold under a similar name, to another model, to a factory mold, or to your house brand. The sheet works as a template of fields your RFQ fills with declared values; the values themselves stay with Yonex's product.

What a Material Benchmark Does in a Racket RFQ

A benchmark, in sourcing language, is a named reference model kept in the file so the RFQ asks about the right fields in the right units. It is not something you hand over and receive back as an equivalent product. A qualification spec states the acceptance value, the measuring method and the sample size; a benchmark states only what another company published about its own build. QC can reject a shipment against the first. Against the second it can only ask.

That difference sets the cost of getting it wrong. An RFQ line reading "same as the reference" lets a supplier answer yes to anything, and incoming inspection has no criterion to fail. A line reading "declared average weight, weighing condition stated" turns a light sample into a documented deviation.

Reading the 3AX88D-G Spec Sheet, Field by Field

The page lists flex as Medium, a frame of HM Graphite, CSR and Tungsten, a shaft of HM Graphite and 2G-NANOMESH NEO, and a Built-in T-Joint. Flex is a stiffness class on the maker's own scale, not a measured deflection, so Medium travels as a relative label. HM Graphite names the high-modulus carbon family; CSR and 2G-NANOMESH NEO are trade names for material and construction callouts the page never breaks into layup, resin system or fiber orientation. A built-in T-joint is a throat joint named as integrated into the frame.

The measurable fields are thinner. Weight and grip appear as a 4U weight class and grip codes G5 and G6; 4U is a weight class label, and the page states an average weight rather than a tolerance. Length is listed only as a 10 mm extension, with no base figure given. The page gives stringing advice of 4U: 20–28 lb, with colors listed as Black and Silver. Each field is a declaration slot: it tells you what to ask the factory to state about its own frame, in these units, with the measuring condition attached.

Why the Item Code Matters More Than the Model Name

Those fields are published for item code 3AX88D-G and nothing else in our hands. An order naming only the marketing name invites a reply built on a different member of the same family, and the reply will be internally consistent while describing a product you did not ask about. Most people assume the family name is the specification, since the marketing copy reads as one story. In fact the values hold to a single item code on a single page version.

Carrying the code and the sheet date costs nothing and settles arguments later. When a sample feels stiffer than expected, the question is not whether it matches the family; it is which declared value on which line you agreed to. A dated field list also lets you show what you built the RFQ from after a page is revised.

Which Numbers Survive the Trip into an RFQ

Sort the figures by what they can do in a document. The 4U class and its grip codes restate as a weight-and-grip class the supplier must declare and your team must weigh, provided the weighing condition is written down. The page's own stringing advice is published for this item code at that weight class on a finished frame and is not a warranty range for a layup nobody has built. Ask the factory what range it will stand behind for its own frame.

Length trips procurement most often. Most people assume the length entry hands them a finished length to order; in fact no absolute length is supplied, so there is no target to copy. The line has to ask for the supplier's own overall length and the method behind it — where the measurement starts and ends, strung or unstrung, tolerance stated. Two factories can both answer "long" and ship frames several millimeters apart.

HM Graphite and Tungsten Are Not Purchase Specifications

Trade names describe a marketed construction, not an orderable one. HM Graphite, CSR and Tungsten can sit on very different layups, resin contents and wall thicknesses, and the words alone do not tell your team which one it is. A factory repeating the words back gives QC nothing to reject on. An RFQ written in adjectives produces inspection reports written in adjectives, and the deviation surfaces when a customer returns the frame.

Most people assume matching material words means matching product; actually the words are the opening question. What you want declared is composition per part, the layup description the supplier will disclose, and the test method used on the finished frame. A supplier that cannot answer at that level is telling you how the rest of the order will go.

Turning the Benchmark into RFQ Declaration Lines

Here is the part most RFQs skip: give the supplier a declaration column instead of a target column, one line per field the reference sheet uses — flex class on their own scale, frame and shaft composition per part, measured average weight with the weighing condition, grip size, overall length with method and tolerance, and the tension range they will support at that weight class. Each line asks for a value plus how it was obtained. A filled column becomes your sample approval checklist; a blank one shows the gap.

The commercial lines stay open because we hold no quotation, minimum order quantity, lead time, capacity figure, custom-branding terms or sample test result for any factory. Price, MOQ, tooling ownership, decoration method and the date a pre-production sample can be measured go to the supplier as questions. Nothing on those lines gets filled in from a reference brand, however convenient the sheet makes it look.

When a Supplier Says They Already Match the Spec

A match claim earns a place in the file only when it arrives as declared values, with a stated measuring method and a sample approval step your team signed off. A reply that repeats material names and flex labels without numbers is unverified: send the declaration list back before tooling starts. Tooling is where a vague RFQ becomes irreversible, and reopening a spec at that point means a new mold or a batch you cannot reject cleanly.

What we cannot do is confirm a factory. We hold no sample test, no batch record and no certification for any supplier, and no value on the reference sheet transfers as an approval. That frame is Yonex's own product, documented by Yonex for item code 3AX88D-G. It is not proof that anyone else can build to it, and it is not a promise about what your supplier will ship.